Research Explorer

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Researcher

Freddy Callens

270 Results

2022

Investigation of paramagnetic dopant centres in materials for sensor applications

Kwinten MaesHenk VrielinckFreddy Callens

Paramagnetic centers in LiF:Mg,Cu,P thermoluminescence radiation dosimeters

Henk VrielinckKwinten MaesFreddy Callens

2021

Determination of the g-, hyperfine coupling- and zero-field splittingtensors in EPR and ENDOR using extended Matlab codes

A1 Journal Article in JOURNAL OF MAGNETIC RESONANCE

Identification of vanadium dopant sites in the metal-organic framework DUT-5(Al)

Kwinten MaesLisa MartinSamira KhelifiAlexander HoffmanKaren LeusPascal Van Der VoortPhilippe SmetVeronique Van SpeybroeckFreddy CallensHenk Vrielinck

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

2020

EPR CHARACTERIZATION OF Gd3+ IMPURITY IONS IN Li6Y(BO3)3 SINGLE CRYSTALS

Maarten De CoenHenk VrielinckFreddy Callens

Elucidating the promotional effect of a covalent triazine framework in aerobic oxidation

Sara AbednatanziParviz Gohari DerakhshandehPieter TackFrancesco Muniz MirandaJonas EveraertFlore Vanden BusscheLaszlo VinczeChristian StevensVeronique Van SpeybroeckHenk VrielinckFreddy CallensKaren LeusPascal Van Der Voort

A1 Journal Article in APPLIED CATALYSIS B-ENVIRONMENTAL

Metal-free activation of molecular oxygen by covalent triazine frameworks for selective aerobic oxidation

Sara AbednatanziParviz Gohari DerakhshandehKaren LeusHenk VrielinckFreddy CallensPascal Van Der Voort

A1 Journal Article in SCIENCE ADVANCES

Understanding dopant incorporation in metal organic frameworks via electron paramagnetic resonance spectroscopy (lecture, 38 min.)

Henk VrielinckKwinten MaesFreddy Callens

2019

EPR characterization of vanadium dopant sites in DUT-5(Al)

Kwinten MaesIrena NevjesticKaren LeusPascal Van Der VoortHenk VrielinckFreddy Callens

A1 Journal Article in OPTICAL MATERIALS

Electron paramagnetic resonance characterization of vanadium dopant sites in DUT-5(Al)

Kwinten MaesKaren LeusPascal Van Der VoortHenk VrielinckFreddy Callens

Multi-frequency EPR characterization of vanadium dopant sites in DUT-5(Al)

Kwinten MaesKaren LeusPascal Van Der VoortHenk VrielinckFreddy Callens

Multi-frequency electron magnetic resonance characterization of vanadium dopant sites in the metalorganic framework DUT-5(Al)

Kwinten MaesKaren LeusPascal Van Der VoortHenk VrielinckFreddy Callens

2018

ENDOR-induced EPR of disordered systems : application to X-irradiated alanine

Jevgenij KusakovskijKwinten MaesFreddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Effects of gas exposure on the EPR spectrum of V(IV) doped into the metal-organic framework MIL-53(Al)

Kwinten MaesIrena NevjesticHenk VrielinckFreddy Callens

In situ electron paramagnetic resonance study of breathing phenomena and related framework transformations in paramagnetically doped metal-organic frameworks

Irena NevjesticHenk VrielinckFreddy CallensPascal Van Der Voort

2017

Discovery of a novel, large pore phase in a bimetallic Al/V metal-organic framework

Hannes DepauwIrena NevjesticGuangbo WangKaren LeusFreddy CallensEls De CanckKlaartje De BuysserHenk VrielinckPascal Van Der Voort

A1 Journal Article in JOURNAL OF MATERIALS CHEMISTRY A

EPR study of luminescence-based radiation dosimeters

Kwinten MaesLars LowieJevgenij KusakovskijHenk VrielinckFreddy Callens

Electron-nuclear double resonance approach for studying radiation damage in DNA

Jevgenij KusakovskijHenk VrielinckFreddy Callens

Investigating luminescence-based radiation dosimeters using EPR methods

Kwinten MaesLars LowieJevgenij KusakovskijLuana de Freitas NascimentoHenk VrielinckFreddy Callens

Microwave induced 'egg yolk' structure in Cr/V-MIL-53

Hannes DepauwIrena NevjesticGuangbo WangKatrien HaustraeteKaren LeusAn VerberckmoesChristophe DetavernierFreddy CallensEls De CanckHenk VrielinckPascal Van Der Voort

A1 Journal Article in CHEMICAL COMMUNICATIONS

On the identity of the last known stable radical in X-irradiated sucrose

Jevgenij KusakovskijHendrik De CoomanFreddy CallensHenk Vrielinck

A1 Journal Article in CHEMICAL PHYSICS LETTERS

Sensing the environment of V4+ dopant ions in a metal organic framework with EPR spectroscopy and X-ray diffraction

Irena NevjesticHannes DepauwKaren LeusPascal Van Der VoortHenk VrielinckFreddy Callens

Sensing the framework state and guest molecules in MIL-53(Al) via the electron paramagnetic resonance spectrum of V-IV dopant ions

Irena NevjesticHannes DepauwPieter TackDavy DeduytscheKaren LeusLaszlo VinczeChristophe DetavernierPascal Van Der VoortFreddy CallensHenk Vrielinck

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

2016

Breathing effect in V-doped metal organic framework MIL-53(Al) studied by electron paramagnetic resonance (EPR)

Irena NevjesticHannes DepauwKaren LeusPascal Van Der VoortFreddy CallensHenk Vrielinck

Breathing effect in the V-doped metal organic framework MIL-53(Al) monitored in situ by electron paramagnetic resonance and X-ray diffraction (XRD)

Irena NevjesticHannes DepauwKaren LeusPascal Van Der VoortFreddy CallensHenk Vrielinck

Computational study of a fourth stable radical in X-irradiated sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

ENDOR-induced EPR of disordered systems: application to X-irradiated sucrose and alanine

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

EPR and DFT analysis of biologically relevant chromium(V) complexes with D-glucitol and D-glucose

Freddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF INORGANIC BIOCHEMISTRY

ESR spectroscopy of alanine impacted by high energy irradiations for wide range dosimetry

Freddy CallensJevgenij KusakovskijHenk Vrielinck

A1 Journal Article in LITHUANIAN JOURNAL OF PHYSICS

Fourth stable radical species in X-irradiated solid-state sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

In situ electron paramagnetic resonance and X-ray diffraction monitoring of temperature-induced breathing and related structural transformations in activated V-doped MIL-53(Al)

Irena NevjesticHannes DepauwKaren LeusGeert RampelbergChristophe DetavernierPascal Van Der VoortFreddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY C

Regulating the breathing effect of a flexible biphenyl MOF, by a mixed metal approach

Hannes DepauwIrena NevjesticKaren LeusFreddy CallensHenk VrielinckPascal Van Der Voort

Tailoring the breathing effect of a flexible MOF, COMOC-2 by a mixed metal approach

Hannes DepauwIrena NevjesticKaren LeusGuangbo WangFreddy CallensHenk VrielinckPascal Van Der Voort

Temperature dependence of X-irradiated sucrose powder EPR spectrum

Kwinten MaesJevgenij KusakovskijFreddy CallensHenk Vrielinck

Temperature-induced breathing effect of V-doped MIL-53(Al) monitored in situ by electron paramagnetic resonance and X-ray diffraction

Irena NevjesticHannes DepauwKaren LeusPascal Van Der VoortFreddy CallensHenk Vrielinck

VIV ions as paramagnetic probe for monitoring the structural flexibility of V-doped MIL-53(Al)

Irena NevjesticHannes DepauwKaren LeusPascal Van Der VoortFreddy CallensHenk Vrielinck

2015

Breathing effect in activated V-doped Al-MOF studied with EPR

Irena NevjesticHannes DepauwKaren LeusFreddy CallensPascal Van Der VoortHenk Vrielinck

EMR Study and DFT-assisted identification of transient radicals in X‑irradiated crystalline sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

EPR and ENDOR study of a V-doped Al-metal organic framework

Irena NevjesticHannes DepauwKaren LeusFreddy CallensPascal Van Der VoortHenk Vrielinck

Electron magnetic resonance study of radiation-induced radicals in DNA

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Electronic properties of manganese impurities in germanium

Johan LauwaertSiegfried SegersFilip MoensKarl OpsomerPaul ClauwsFreddy CallensEddy SimoenHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICS D-APPLIED PHYSICS

Multi-frequency (S, X, Q and W-band) EPR and ENDOR study of vanadium (IV) incorporation in the aluminium metal-organic framework MIL-53

Irena NevjesticHannes DepauwKaren LeusSabine Van DoorslaerFreddy CallensPascal Van Der VoortHenk Vrielinck

A1 Journal Article in CHEMPHYSCHEM

Powder ENDOR study of the fourth stable radical species in X irradiated sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Study of point defects in monocrystalline germanium

Siegfried SegersHenk VrielinckFreddy Callens

Towards identifying the all known stable radical species in X-irradiated sucrose

Jevgenij KusakovskijKwinten MaesHenk VrielinckFreddy Callens

Towards identifying the last known stable radical species in X irradiated sucrose

Jevgenij KusakovskijFreddy CallensKwinten MaesHenk Vrielinck

X-ray enhancement of CsI:Eu2+ radioluminescence

Henk VrielinckFreddy Callens

A1 Journal Article in JOURNAL OF LUMINESCENCE

2014

Characterizing vanadium dopant sites in an Al-metal-organic framework by electron magnetic resonance spectroscopy

Irena NevjesticHannes DepauwKaren LeusFreddy CallensPascal Van Der VoortHenk Vrielinck

Confirming vanadium dopant incorporation in an Al-metal-organic framework MIL-53 by EPR and ENDOR spectroscopy

Irena NevjesticHannes DepauwKaren LeusFreddy CallensPascal Van Der VoortHenk Vrielinck

Deep-level transient spectroscopy study of quenched-in defects in germanium

Siegfried SegersJohan LauwaertPaul ClauwsFreddy CallensJan VanhellemontEddy SimoenHenk Vrielinck

Direct estimation of capture cross sections in the presence of slow capture: application to the identification of quenched-in deeplevel defects in Ge

Siegfried SegersJohan LauwaertPaul ClauwsEddy SimoenJan VanhellemontFreddy CallensHenk Vrielinck

A1 Journal Article in SEMICONDUCTOR SCIENCE AND TECHNOLOGY

Fourth stable radical species in X-ray irradiated sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Mn related defect levels in germanium

Johan LauwaertFilip MoensSiegfried SegersKarl OpsomerEddy SimoenJan VanhellemontPaul ClauwsFreddy CallensHenk Vrielinck

Nitrogen split interstitial center (N-N)N in GaN : high frequency EPR and ENDOR study

Henk VrielinckFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Radiation chemistry of solid-state carbohydrates using EMR

Henk VrielinckHendrik De CoomanFreddy Callens

Bookchapter in Applications of EPR in radiation research

Resolving the relative tilting of hyperfine and g tensors for vanadyl complexes in the Al-metal-organic framework MIL-53 by a multifrequency (S, X, Q, and W-band) EPR approach

Irena NevjesticHannes DepauwKaren LeusSabine Van DoorslaerFreddy CallensPascal Van Der VoortHenk Vrielinck

Room temperature Q-band electron magnetic resonance study of radicals in X-ray-irradiated L-threonine single crystals

Gauthier VanhaelewynHenk VrielinckFreddy Callens

A1 Journal Article in RADIATION PROTECTION DOSIMETRY

Study of transient radicals created immediately after room temperature X-ray irradiation in single crystal sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Studying the effectiveness of V-incorporation in the Al-metal-organic framework MIL-53 with electron-nuclear double resonance spectroscopy

Irena NevjesticHannes DepauwKaren LeusFreddy CallensPascal Van Der VoortHenk Vrielinck

Studying the environment of vanadyl complexes in the Al-Metal-Organic framework MIL-53 by a multifrequency EPR and ENDOR approach

Irena NevjesticHannes DepauwKaren LeusSabine Van DoorslaerFreddy CallensPascal Van Der VoortHenk Vrielinck

Towards understanding of the dosimetric EPR spectrum of irradiated sucrose : ENDOR characterization of a fourth stable radical species

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Understanding detailed features of the dosimetric EPR spectrum of irradiated sucrose

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Understanding the EPR spectrum of irradiated sucrose for radiation dosimetry

Jevgenij KusakovskijFreddy CallensHenk Vrielinck

Understanding the dosimetric powder EPR spectrum of sucrose by identification of the stable radiation-induced radicals

Henk VrielinckJevgenij KusakovskijGauthier VanhaelewynPaul MatthysFreddy Callens

A1 Journal Article in RADIATION PROTECTION DOSIMETRY

2013

Dominant stable radicals in irradiated sucrose: g tensors and contribution to the powder electron paramagnetic resonance spectrum

Hendrik De CoomanJevgenij KusakovskijAndy Van Yperen-De DeyneMichel WaroquierFreddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

Electron paramagnetic resonance spectrum of room temperature irradiated sucrose: characterization beyond the known stable radicals

Jevgenij KusakovskijHenk VrielinckFreddy Callens

Q-band EMR study of radicals in X-irradiated L-threonine

Gauthier VanhaelewynHenk VrielinckFreddy Callens

Room temperature radiation products in trehalose single crystals : EMR and DFT analysis

Hendrik De CoomanMihaela Adeluta TarpanHenk VrielinckMichel WaroquierFreddy Callens

A1 Journal Article in RADIATION RESEARCH

Temperature independent slow hole emission from transition metal centers in germanium

Siegfried SegersJohan LauwaertPaul ClauwsFreddy CallensJan VanhellemontHenk Vrielinck

Temperature-independent slow carrier emission from deep-level defects in p-type germanium

Siegfried SegersJohan LauwaertPaul ClauwsJan VanhellemontFreddy CallensHenk Vrielinck

A1 Journal Article in JOURNAL OF PHYSICS D-APPLIED PHYSICS

Ti-functionalized NH₂-MIL-47 : an effective and stable epoxidation catalyst

Karen LeusGauthier VanhaelewynThomas BogaertsYing-Ya LiuMaria Dolores Esquivel MerinoFreddy CallensGuy MarinVeronique Van SpeybroeckHenk VrielinckPascal Van Der Voort

A1 Journal Article in CATALYSIS TODAY

Tunnel emission from Co and Cr-related levels in p-type Ge

Siegfried SegersJohan LauwaertPaul ClauwsJan VanhellemontFreddy CallensHenk Vrielinck

Understanding the dosimetric powder EPR spectrum of sucrose by identification of the stable radiation-induced radicals

Henk VrielinckJevgenij KusakovskijGauthier VanhaelewynPaul MatthysFreddy Callens

2012

A temperature independent emission component in the capacitance transients of deep-level defects in germanium

Siegfried SegersJohan LauwaertPaul ClauwsFreddy CallensJan VanhellemontHenk Vrielinck

Direct-effect radiation damage in sugars: a combined EMR and DFT study

Hendrik De CoomanMihaela Adeluta TarpanGauthier VanhaelewynHenk VrielinckFreddy Callens

EPR and speciation simulation study of Cu2+ complexes in an amine-based aqueous precursor system used for preparation of superconducting YBCO coatings

Petra LommensJonas FeysHenk VrielinckKlaartje De BuysserGerrit HermanFreddy CallensIsabel Van Driessche

A1 Journal Article in DALTON TRANSACTIONS

Electron paramagnetic resonance study of Eu2+ centers in melt-grown CsBr single crystals

Henk VrielinckDmitry ZverevPaul MatthysFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Electron paramagnetic resonance study of the active vanadium sites in MIL-47

Henk VrielinckGauthier VanhaelewynKaren LeusYing-Ya LiuFreddy CallensPascal Van Der Voort

Radiation products at 77 K in trehalose single crystals: EMR and DFT analysis

Mihaela Adeluta TarpanHendrik De CoomanMichel WaroquierFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Role of radicals in UV-initiated postplasma grafting of poly-ε-caprolactone: an electron paramagnetic resonance study

Hendrik De CoomanTim DesmetFreddy CallensPeter Dubruel

A1 Journal Article in JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

The coordinatively saturated vanadium MIL-47 as a low leaching heterogeneous catalyst in the oxidation of cyclohexene

Karen LeusMatthias VandichelYing-Ya LiuIlke MuylaertJan MusschootSteven PylHenk VrielinckFreddy CallensGuy MarinChristophe DetavernierMichel WaroquierVeronique Van SpeybroeckPascal Van Der Voort

A1 Journal Article in JOURNAL OF CATALYSIS

Towards understanding powder EPR spectra of irradiated sugars applied in dosimetry and detection of irradiated foodstuffs

Henk VrielinckHendrik De CoomanJevgenij KusakovskijGauthier VanhaelewynFreddy Callens

2011

A photosensitive Cr3+ center in photorefractive Bi12SiO20 crystals co-doped with chromium and phosphorus

Henk VrielinckFreddy Callens

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

Assessment of periodic and cluster-in-vacuo models for first principles calculation of EPR parameters of paramagnetic defects in crystals: Rh2+ defects in NaCl as case study

Nuriya SakhabutdinovaAndy Van Yperen-De DeyneEwald PauwelsVeronique Van SpeybroeckHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

DLTS and FTIR study of quenching induced defects in germanium

Siegfried SegersJohan LauwaertHenk VrielinckPaul ClauwsFreddy CallensJan Vanhellemont

Deep level transient spectroscopy (DLTS) study of P3HT:PCBM organic solar cells

Johan LauwaertSamira KhelifiKoen DecockMarc BurgelmanFreddy CallensHenk Vrielinck

Electron magnetic resonance study of the structure and thermal stability of radiation-induced radicals in fructose and trehalose

Mihaela Adeluta TarpanFreddy CallensHenk Vrielinck

Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu2+ medical imaging plates

Henk VrielinckFrank LonckePaul MatthysFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Electron paramagnetic resonance study of rare-earth related centres in K2YF5:Tb3+ thermoluminescence phosphors

Dmitry ZverevHenk VrielinckFreddy Callens

A1 Journal Article in OPTICAL MATERIALS

Field-enhanced electron capture by iron impurities in germanium

Johan LauwaertSiegfried SegersDiederik DeplaJan VanhellemontPaul ClauwsFreddy CallensHenk Vrielinck

Identification of primary free radicals in trehalose dihydrate single crystals X-irradiated at 10 K

Mihaela Adeluta TarpanHendrik De CoomanMichel WaroquierFreddy Callens

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

The 4th International comparison on EPR dosimetry with tooth enamel, part 1: report on the results

Freddy CallensLuc MartensMihaela Adeluta TarpanHubert Thierens

A1 Journal Article in RADIATION MEASUREMENTS

2010

Defect creation and passivation by hydrogen plasma in silicon and germanium

Johan LauwaertFreddy CallensHenk VrielinckPaul Clauws

Direct-effect radiation chemistry of solid-state carbohydrates using EMR and DFT

Hendrik De CoomanMihaela Adeluta TarpanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

Dosimetric characteristics of different types of saccharides: an EPR and UV spectrometric study

Hendrik De CoomanHenk VrielinckFreddy Callens

A1 Journal Article in RADIATION PHYSICS AND CHEMISTRY

EPR and speciation simulation study on the complexation of Cu2+ ions in the aqueous sol-gel system used for the preparation of superconducting YBCO coatings

Petra LommensHenk VrielinckJonas FeysKlaartje De BuysserFreddy CallensIsabel Van Driessche

EPR dosimetry with tooth enamel: a review

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

Electron magnetic resonance and density functional theory study of room temperature X-irradiated β-D-fructose single crystals

Mihaela Adeluta TarpanEwald PauwelsHenk VrielinckFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Electron magnetic resonance study of primary free radicals in trehalose single crystals

Mihaela Adeluta TarpanHendrik De CoomanFreddy Callens

Oxidation and reduction products of X irradiation at 10 K in sucrose single crystals: radical identification by EPR, ENDOR, and DFT

Hendrik De CoomanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

Paramagnetic resonance study of rare earth doped K2YF5 thermoluminescent phosphors

Dmitry ZverevFreddy CallensHenk Vrielinck

Which role do excited states play in radiation damage to organic solid-state compounds?

Hendrik De CoomanEwald PauwelsFreddy CallensMichel Waroquier

2009

A combined EMR and DFT study of radiation-induced defects in sucrose and glucose 1-phosphate

Hendrik De CoomanFreddy CallensMichel Waroquier

Combined Electron Magnetic Resonance and Density Functional Theory Study of Thermally Induced Free Radical Reactions in Fructose and Trehalose Single Crystals

Mihaela Adeluta TarpanHendrik De CoomanEwald PauwelsMichel WaroquierFreddy Callens

DFT characterisation of structural and EPR properties of Rh defects in alkali halide lattices

Nuriya SakhabutdinovaEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

Determination of the g Tensors for the Dominant Stable Radicals in X-Irradiated beta-D-Fructose Single Crystals

Mihaela Adeluta TarpanHenk VrielinckHendrik De CoomanFreddy Callens

A1 Journal Article in Journal of Physical Chemistry A

ENDOR and HYSCORE Analysis and DFT-Assisted Identification of the Third Major Stable Radical in Sucrose Single Crystals X-Irradiated at Room Temperature

Hendrik De CoomanEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

ENDOR in field-frequency space: orientation, species and quantum state selection

Henk VrielinckFrank LonckeMihaela Adeluta TarpanHendrik De CoomanDmitry ZverevFreddy Callens

EPR and speciation simulation study of Cu2+ complexes in aqueous sol-gel systems used for preparation of superconducting YBCO coatings

Petra LommensJonas FeysHenk VrielinckKlaartje De BuysserFreddy CallensIsabel Van Driessche

Early-Stage Evolution of the EPR Spectrum of Crystalline Sucrose at Room Temperature after High-Dose X Irradiation

Henk VrielinckHendrik De CoomanFreddy Callens

A1 Journal Article in Radiation Research

Electron Magnetic Resonance study of the Structure and Thermal Stability of Radiation-Induced Free Radicals in Trehalose Single Crystals

Mihaela Adeluta TarpanHendrik De CoomanHenk VrielinckFreddy Callens

Magnetic resonance study of dopant related defects in X-ray storage phosphors

Frank LonckeFreddy CallensPaul Matthys

Modeling Radiation-Damage Processes in Organic Solids via DFT Calculations of EMR Parameters

Hendrik De CoomanEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

Radiation-induced radical formation in solid state sugars: a review of recent EMR and DFT results

Hendrik De CoomanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

Structure of F2(-) centers in K2YF5 and their relation to thermoluminescence below room temperature

Dmitry ZverevHenk VrielinckPhilippe SmetDirk PoelmanFreddy Callens

A1 Journal Article in Physical Review B

Temperature dependence of Eu-related EPR spectra in CsBr:Eu needle image plates

Frank LonckeHenk VrielinckPaul MatthysFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Thermally activated reactions of radiation-induced radicals in sugar single crystals: an electron magnetic resonance and DFT study

Hendrik De CoomanHenk VrielinckEwald PauwelsMichel WaroquierFreddy Callens

Transferred hyperfine interactions for Yb3+ ions in CsCaF3 and Cs2NaYF6 single crystals: experimental and ab initio study

Freddy CallensHenk Vrielinck

A1 Journal Article in PHYSICAL REVIEW B

2008

An international intercomparison on "self-calibrated" alanine EPR dosimeters

A1 Journal Article in RADIATION PHYSICS AND CHEMISTRY

Combined electron magnetic resonance and density functional theory study of 10 K x-irradiated beta-D-Fructose single crystals

Mihaela Adeluta TarpanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

EPR, ENDOR and HYSCORE study of X-ray induced centres in K2YF5 thermoluminescent phosphors

Dmitry ZverevHenk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Electron paramagnetic resonance study of a Eu2+ related defect in CsBr: Eu needle image plates for computed radiography

Frank LonckeHenk VrielinckPaul MatthysFreddy Callens

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Electron paramagnetic resonance study of centres involved in storage processes in K2YF5: RE thermoluminescent phosphors

Henk VrielinckDmitry ZverevPhilippe SmetDirk PoelmanFreddy Callens

A1 Journal Article in MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY

Identification and conformational study of stable radiation-induced defects in sucrose single crystals using density functional theory calculations of electron magnetic resonance parameters

Hendrik De CoomanEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

Identifying radiation-induced radicals and their formation mechanisms in sugars and sugar derivatives using DFT methods

Hendrik De CoomanEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

Paramagnetic Eu2+ center as a probe for the sensitivity of CsBr x-ray needle image plates

Frank LonckeHenk VrielinckPaul MatthysFreddy Callens

A1 Journal Article in APPLIED PHYSICS LETTERS

Radiation-Induced Radicals in Glucose-1-phosphate. I. Electron Paramagnetic Resonance and Electron Nuclear Double Resonance Analysis of in situ X-Irradiated Single Crystals at 77 K

Hendrik De CoomanEwald PauwelsMichel WaroquierFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

Radiation-Induced Radicals in Glucose-1-phosphate. II. DFT Analysis of Structures and Possible Formation Mechanisms

Ewald PauwelsHendrik De CoomanFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

Radiation-induced defects in sucrose single crystals, revisited: a combined electron magnetic resonance and density functional theory study

Hendrik De CoomanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Radicals in Sucrose Single Crystals Induced by X-rays at Different Temperatures: a Combined EPR and DFT Study

Hendrik De CoomanEwald PauwelsHenk VrielinckMichel WaroquierFreddy Callens

The growth of Co: ZnO/ZnO core/shell colloidal quantum dots : changes in nanocrystal size, concentration and dopant coordination

Petra LommensKarel LambertFrank LonckeDavid De MuynckFrank VanhaeckeHenk VrielinckFreddy CallensZeger Hens

A1 Journal Article in CHEMPHYSCHEM

2007

Dopant incorporation in colloidal quantum dots: A case study on Co2+ doped ZnO

Petra LommensFrank LonckePhilippe SmetFreddy CallensDirk PoelmanHenk VrielinckZeger Hens

A1 Journal Article in CHEMISTRY OF MATERIALS

EPR and ENDOR analysis of Fe3+ impurity centers in fluoroelpasolite lattices

Frank LonckeHendrik De CoomanHenk VrielinckPaul MatthysFreddy Callens

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

K2YF5 crystal symmetry determined by using rare-earth ions as paramagnetic probes

Frank LonckeDmitry ZverevHenk VrielinckPaul MatthysFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Multifrequency electron paramagnetic resonance study on deproteinized human bone

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

2006

Anomalous photoluminescence in BaS: Eu

Philippe SmetJo Van HaeckeFrank LonckeHenk VrielinckFreddy CallensDirk Poelman

A1 Journal Article in PHYSICAL REVIEW B

Anomalous photoluminescence in BaS:Eu2+

Philippe SmetJo Van HaeckeFrank LonckeHenk VrielinckFreddy CallensDirk Poelman

Density functional investigation of high-spin XY (X = Cr, Mo, W and Y = C, N, O) molecules

Freddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Electron-trapping centers and interstitials in chlorinated SrCl2: Fe single crystals

Henk VrielinckFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

Interactions between Er3+ ions in Cs2NaYF6 crystals studied with PL, Zeeman and EPR spectroscopy

Henk VrielinckPhilippe SmetFreddy Callens

Q-band EPR and ENDOR of low temperature X-irradiated beta-D-fructose single crystals

Gauthier VanhaelewynEwald PauwelsFreddy CallensMichel WaroquierPaul Matthys

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

The Rh-ligand bond: RhX (X = C, N, O, F, P and Cl) molecules

Veronique Van SpeybroeckFreddy CallensMichel Waroquier

A1 Journal Article in CHEMICAL PHYSICS LETTERS

X- (X = O, S) ions in alkali halide lattices through density functional calculations. 1. Substitutional defect models

Henk VrielinckVeronique Van SpeybroeckFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

X- (X = O, S, Se) ions in alkali halide lattices through density functional calculations. 2. Interstitial defect models

Veronique Van SpeybroeckEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY B

2005

Ab initio EPR study of S-3(-) and Se-3(-) defects in alkali halides

Franky StevensHenk VrielinckFreddy CallensEwald PauwelsVeronique Van SpeybroeckMichel Waroquier

A1 Journal Article in INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

EPR study of the Fe+(IIa) centre in chlorinated SrCl2:Fe crystals

Henk VrielinckFreddy Callens

A2 Journal Article in PHYSICA STATUS SOLIDI C - CONFERENCES AND CRITICAL REVIEWS

Level of theory study of magnetic resonance parameters of chalcogen XY- (X, Y=O, S and Se) defects in alkali halides

Franky StevensVeronique Van SpeybroeckEwald PauwelsHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Magnetic resonance study of Cr3+ and Fe3+ centers in hexagonal Cs2NaAlF6 and Cs2NaGaF6 crystals

Henk VrielinckFrank LonckeFreddy CallensPaul Matthys

A2 Journal Article in PHYSICA STATUS SOLIDI C - CONFERENCES AND CRITICAL REVIEWS

Multi-frequency electron paramagnetic resonance study of irradiated human finger phalanxes

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

On 2.7 mu m emission from Er-doped large bandgap hosts

Henk VrielinckFreddy Callens

Study of radical defects in crystalline lattices from first-principles molecular dynamics simulations

Veronique Van SpeybroeckEwald PauwelsFranky StevensFreddy CallensMichel Waroquier

A1 Journal Article in INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

2004

Attempts at correlation of the radiolytic species of irradiated solid-state captopril studied by multi-frequency EPR and HPLC

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in RADIATION RESEARCH

DFT-EPR study of radiation-induced radicals in alpha-D-glucose

Ewald PauwelsVeronique Van SpeybroeckGauthier VanhaelewynFreddy CallensMichel Waroquier

A1 Journal Article in INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY

Density functional theory investigation of S-2(-) in KCl: evidence for the existence of a di-vacancy site

Franky StevensHenk VrielinckFreddy CallensMichel Waroquier

A1 Journal Article in SOLID STATE COMMUNICATIONS

ENDOR-assisted study of the stable EPR spectrum of X-irradiated alpha-L-sorbose single crystals: MLCFA and simulation decomposition analyses

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in RADIATION RESEARCH

Effect of different sterilisation methods on the properties of bioadhesive powders and ocular minitablets, and clinical evaluation

Eva D'HaeseGauthier VanhaelewynPhilippe KestelynFreddy CallensHans NelisJean Paul Remon

A1 Journal Article in EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES

Experimental and theoretical electron magnetic resonance study on radiation-induced radicals in alpha-L-sorbose single crystals

Gauthier VanhaelewynEwald PauwelsMichel WaroquierFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Identification of Cr3+ centers in Cs2NaAlF6 and Cs2NaGaF6 crystals by EPR and ENDOR paramagnetic resonance techniques

Henk VrielinckFrank LonckeFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL REVIEW B

X- and Q-band ENDOR study of the Fe+(II) center in chlorinated SrCl2: Fe crystals

Henk VrielinckFreddy Callens

A1 Journal Article in PHYSICAL REVIEW B

2003

A multi-frequency EPR and ENDOR study of Rh and Ir complexes in alkali and silver halides

Freddy CallensHenk VrielinckPaul Matthys

A1 Journal Article in RADIATION EFFECTS AND DEFECTS IN SOLIDS

Ab initio investigation of electron paramagnetic resonance parameters of S-2(-), SSe-, and Se-2(-) radicals in alkali halides

Franky StevensHenk VrielinckFreddy CallensEwald PauwelsMichel Waroquier

A1 Journal Article in PHYSICAL REVIEW B

Physical and chemical properties of thin films obtained by plasma polymerisation in a dielectric barrier discharge

Henk VrielinckFreddy CallensChristophe Leys

A1 Journal Article in NEW DIAMOND AND FRONTIER CARBON TECHNOLOGY

Reinterpretation of temperature-induced dynamical behavior in the EPR spectrum of Rh2+ centers in AgCl

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL REVIEW B

Single crystal magnetic resonance study of a Rh2+ dimer centre in NaCl at Q-band

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in RADIATION EFFECTS AND DEFECTS IN SOLIDS

2002

Comparative X- and Q-band EPR study of radiation-induced radicals in tooth enamel.

Gauthier VanhaelewynPaul MatthysFreddy Callens

A1 Journal Article in RADIATION RESEARCH

Density-functional study of S-2(-) defects in alkali halides.

Franky StevensHenk VrielinckFreddy CallensEwald PauwelsMichel Waroquier

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

EPR spectrum and formation properties of a cubic Rh+ centre in NaCl.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Electron paramagnetic resonance spectroscopy of Cr3+ in hexagonal Cs2NaGaF6 crystals.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in RADIATION EFFECTS AND DEFECTS IN SOLIDS

Magnetic resonance and optical spectroscopy of Yb3+ in cubic fluoroelpasolite Cs2NaYF6 crystals

Freddy CallensHenk Vrielinck

Multi-frequency EPR study of radiation-induced radicals in tooth enamel.

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in RADIATION EFFECTS AND DEFECTS IN SOLIDS

Some recent multi-frequency electron paramagnetic resonance results on systems relevant for dosimetry and dating.

Freddy CallensGauthier VanhaelewynPaul Matthys

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Tentative structures for the radiation-induced radicals in crystalline beta-D-fructose using density functional theory.

Ewald PauwelsGauthier VanhaelewynFreddy CallensMichel Waroquier

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

2001

A critical discussion of the 2nd intercomparison on electron paramagnetic resonance dosimetry with tooth enamel.

Gauthier VanhaelewynSami AmiraFreddy CallensHubert Thierens

A1 Journal Article in RADIATION MEASUREMENTS

Detection of charge compensating cation vacancies near Rh2+ complexes in AgCl and NaCl using Q-band ENDOR.

Henk VrielinckKris SabbeFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Electron magnetic resonance study of stable radicals in irradiated D-fructose single crystals.

Gauthier VanhaelewynWilly MondelaersFreddy Callens

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

Magnetic resonance analysis of Rh complexes in AgCl and NaCl

Henk VrielinckPaul MatthysFreddy Callens

Magnetic resonance study of the Fe+(I) center in SrCl2 single crystals - art. no. 024405.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

Multifrequency EPR study of carbonate- and sulfate-derived radicals produced by radiation in shells and corallite.

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in RADIATION RESEARCH

Q-band electron nuclear double-resonance detection of the cation vacancies near the cis-[RhCl6](4-)center dot 2 Vac complex in NaCl - art. no. 214105.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

X and Q-band ENDOR study of the Fe+(I) center in chlorinated Srcl(2) single crystals.

Henk VrielinckFreddy Callens

A1 Journal Article in RADIATION EFFECTS AND DEFECTS IN SOLIDS

X- and Q-band EPR of carbonate derived radicals in calcium apatites synthesized at high temperatures and heated tooth enamel.

Sami AmiraGauthier VanhaelewynFreddy Callens

A1 Journal Article in PHYSICAL CHEMISTRY CHEMICAL PHYSICS

2000

A decomposition study of the EPR spectrum of irradiated sucrose.

Gauthier VanhaelewynFreddy CallensWilly MondelaersDenis De FrennePaul Matthys

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

Decomposition study of the electron paramagnetic resonance spectrum of irradiated alanine.

Gauthier VanhaelewynSami AmiraWilly MondelaersFreddy Callens

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Determination of capture cross sections and trap depths of dominant centres in AgCl microcrystals doped with [Ru(CN)(6)](4-) complexes.

Jian HuaFreddy CallensFelix Cardon

A1 Journal Article in JOURNAL OF PHYSICS D-APPLIED PHYSICS

EPR spectrum deconvolution and dose assessment of fossil tooth enamel using maximum likelihood common factor analysis.

Gauthier VanhaelewynFreddy Callens

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

ESR study of elephant tooth enamel from the Karlich-Seeufer site in Germany.

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

Magnetic resonance study of Rh complexes in AgCl microcrystals.

Henk VrielinckKris SabbeFreddy CallensPaul Matthys

A1 Journal Article in SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

Shallow electron traps induced by [Ru(CN)(6)](4-) in AgCl microcrystals: a computer simulation study of transient microwave photoconductivity.

Jian HuaFreddy CallensFelix CardonHans De Meyer

A1 Journal Article in JOURNAL OF PHYSICS D-APPLIED PHYSICS

The second international intercomparison on EPR tooth dosimetry.

Sami AmiraFreddy Callens

A1 Journal Article in RADIATION MEASUREMENTS

X- and Q-band electron paramagnetic resonance of CO2- in hydroxyapatite single crystals.

Gauthier VanhaelewynRino MorentFreddy CallensPaul Matthys

A1 Journal Article in RADIATION RESEARCH

X- and Q-band magnetic resonance study of iridium-doped silver chloride microcrystals.

Kris SabbeHenk VrielinckFreddy Callens

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

1999

A density functional study of hyperfine coupling constants in steroid radicals.

Philippe LahorteFreddy CallensWilly Mondelaers

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Applied radiation research around a 15 MeV high-average-power linac.

Philippe LahorteWilly MondelaersDenis De FrenneFreddy CallensGauthier VanhaelewynEtienne SchachtOswald Van CleemputAndré Huyghebaert

A1 Journal Article in RADIATION PHYSICS AND CHEMISTRY

Density functional calculations of hyperfine coupling constants in alanine-derived radicals.

Philippe LahorteGauthier VanhaelewynBert MasschaelePeter CauwelsFreddy CallensWilly Mondelaers

A1 Journal Article in JOURNAL OF PHYSICAL CHEMISTRY A

Effect of temperature on the electron paramagnetic resonance spectrum of irradiated alanine.

Gauthier VanhaelewynWilly MondelaersFreddy Callens

A1 Journal Article in RADIATION RESEARCH

Electron paramagnetic resonance and electronnuclear double resonance investigation of NaCl: Ir - a model system for similarly doped silver halides.

Kris SabbeFreddy CallensPaul Matthys

A1 Journal Article in IMAGING SCIENCE JOURNAL

Magnetic resonance analysis of a hydrated Rh2+ complex in silver chloride microcrystals.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in SOLID STATE COMMUNICATIONS

Material aspects of a-SiN:H based 2D direct X-ray sensor array

Geert Van DoorselaerAndré Van CalsterHerbert De SmetEtienne BoesmanFreddy Callens

Optical transitions of Rh2+ in NaCl crystals studied by electron spin resonance and magnetic circular dichroism.

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

Oxidative stress in plants : EPR monitoring in DMPO-DMSO based extracts

Sabine Van DoorslaerAndrée DedonderFreddy Callens

A1 Journal Article in JOURNAL OF PLANT PHYSIOLOGY

Transient photoconductivity study of shallow electron traps in [Ru(CN)(6)](4-) doped AgCl microcrystals: effects of doping concentration and position.

Jian HuaFreddy CallensFelix Cardon

A1 Journal Article in IMAGING SCIENCE JOURNAL

a-SiN: H thin films for X-ray sensor array.

Geert Van DoorselaerAndré Van CalsterHerbert De SmetFreddy CallensEtienne Boesman

1998

An EPR spectrum decomposition study of irradiated alanine

Gauthier VanhaelewynWilly MondelaersFreddy Callens

Comparison of the effect of X-ray and electron beam irradiation on some selected spices.

Sabine Van CalenbergOswald Van CleemputFreddy CallensWilly MondelaersAndré Huyghebaert

A1 Journal Article in FOOD SCIENCE AND TECHNOLOGY-LEBENSMITTEL-WISSENSCHAFT & TECHNOLOGIE

Comparison of-the Effect on X-ray and Electron Beam Irradiation on Some Selected Spices

Gauthier VanhaelewynOswald Van CleemputFreddy CallensWilly MondelaersAndré Huyghebaert

ENDOR identification of a (RhCl6)4- centre in AgCl:Rh microcrystals through comparison with similarly doped AgCl single crystals

Henk VrielinckFreddy CallensPaul Matthys

ENDOR identification of a Rh+ centre in solution-grown NaCl.

Henk VrielinckFreddy CallensPaul Matthys

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

EPR and ENDOR of radiation-induced CO33- radicals in human tooth enamel heated at 400 degrees C.

Paul MatthysGauthier VanhaelewynFreddy Callens

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

EPR of carbonate derived radicals: Applications in dosimetry, dating and detection of irradiated food.

Freddy CallensGauthier VanhaelewynPaul MatthysEtienne Boesman

A1 Journal Article in APPLIED MAGNETIC RESONANCE

Electron nucelar double resonance of a nearly axial Rh2+ center in solution-grown NaCl crystals.

Freddy CallensHenk VrielinckPaul Matthys

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

Electron paramagnetic resonance and electron nuclear double resonance of NaCl: Rh2+: a comparison between similarly doped Bridgman- and solution-grown single crystals.

Kris SabbeFreddy CallensEtienne Boesman

A1 Journal Article in APPLIED MAGNETIC RESONANCE

Electron spin resonance of rhodium-vacancy complexes in solution-grown NaCl crystals.

Henk VrielinckFreddy Callens

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

Electron spin resonance study of aquated hexachloro-rhodate complexes in AgCl microcrystals.

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

Electron-nuclear double resonance of human tooth enamel heated at 400 degrees C.

Freddy CallensPaul MatthysEtienne Boesman

A1 Journal Article in CALCIFIED TISSUE INTERNATIONAL

Prototype of 2D direct x-ray a-SiN:H sensor array

Geert Van DoorselaerAndré Van CalsterHerbert De SmetFreddy CallensEtienne Boesman

Study of strongly overlapping Rh2+ EPR spectra by high-resolution magnetic resonance techniques.

Kris SabbeHenk VrielinckFreddy CallensEtienne Boesman

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

The possibilities and limitations of powder ENDOR: the study of rhodium complexes in a model system (NaCl) for photographic emulsions

Kris SabbeHenk VrielinckFreddy CallensEtienne Boesman

1997

A local intercomparison study of ESR dosimetry using tooth enamel.

A1 Journal Article in JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

Comparative EPR and ENDOR results on carbonate derived radicals in different host materials

Electron nuclear double resonance of stable Rh centers in solution-grown NaCl single crystals.

Henk VrielinckFreddy CallensEtienne Boesman

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

1996

A study of the composite character of the ESR spectrum of alanine

Freddy CallensKoenraad Van LaereWilly MondelaersPaul MatthysEtienne Boesman

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

An electron nuclear double resonance and electron spin resonance study of isotropic CO2- and SO2- radicals in natural carbonates.

Freddy CallensPeter Moens

A1 Journal Article in JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS

Comparison between the ENDOR data of different superoxide ions in alkali halides.

Freddy CallensFiliep MaesEtienne BoesmanDidier Bouden

A1 Journal Article in PHYSICA STATUS SOLIDI B-BASIC RESEARCH

ENDOR investigation of S-2(-), SSe- and Se-2(-) defects in NaCl.

Filiep MaesFreddy CallensPaul MatthysEtienne Boesman

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

ENDOR study of an O- ion observed in X-ray-irradiated carbonated hydroxyapatite powders.

Peter MoensFreddy CallensPaul Matthys

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

Electron-nuclear double-resonance analysis of diatomic sulfur and selenium defects in NaBr and NaI.

Freddy CallensFiliep MaesEtienne Boesman

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

Oxidative stress in plants: EPR monitoring in dimethylsulfoxide-based extracts

Andrée DedonderFreddy Callens

A1 Journal Article in ARCHIVES OF PHYSIOLOGY AND BIOCHEMISTRY

P-31 and H-1 powder ENDOR study of ozonide radicals in carbonated apatites, synthesized from aqueous solutions.

Sabine Van DoorslaerPeter MoensFreddy CallensPaul MatthysRonald Verbeeck

A1 Journal Article in APPLIED MAGNETIC RESONANCE

Structurele analyse van paramagnetische chalcogenide defecten in alkalihalogeniden en hydroxyapatieten

Sabine Van DoorslaerFreddy CallensEtienne Boesman

The occurrence of multiple dielectric-loss curves for silver halide emulsions: difficulties of interpretation

Freddy CallensLeen SoensFelix Cardon

A2 Journal Article in Journal Appl. Phys. 77(11), pp. 5869-5821 (1995), figg. 12

Transient microwave photoconductivity and computer simulation study of and Rh^+ doped Agi Microcrystals

Marinus Van Den EedenFreddy CallensFelix Cardon

A2 Journal Article in J. Imag; Sei. Technol. 39 (5), pp. 393-402 (1995)

1995

AN ENDOR ANALYSIS OF A DIATOMIC SULFUR DEFECT IN RBI.

Freddy CallensFiliep MaesPaul Matthys

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

An EPR study of intact and powdered human tooth enamel dried at 400-degrees-C.

Freddy CallensRonald Verbeeck

A1 Journal Article in CALCIFIED TISSUE INTERNATIONAL

An endor study of RBI-O-2(-).

Freddy CallensFiliep MaesPaul Matthys

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

Electron-paramagnetic-resonance and molecular orbital study of CO3-ions entrapped in KCI single-crystals.

Freddy CallensEtienne Boesman

A1 Journal Article in JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS

H-1 and P-31 ENDOR of the Isotropie CO2-Signal at g=2.0007 in the EPR-Spectra of Precipitated Carbonated Apatites.

Peter MoensFreddy CallensEtienne BoesmanRonald Verbeeck

A1 Journal Article in APPLIED MAGNETIC RESONANCE

OCCURRENCE OF MULTIPLE DIELECTRIC-LOSS CURVES FOR SILVER-HALIDE EMULSIONS - DIFFICULTIES OF INTERPRETATION.

Freddy CallensFelix Cardon

A1 Journal Article in JOURNAL OF APPLIED PHYSICS

SINGLE-CRYSTAL AND POWDER ELECTRON-NUCLEAR DOUBLE-RESONANCE OF RBCL-O-2(-) - A COMPARISON BETWEEN THE SPIN-HAMILTONIAN PARAMETERS OBTAINED FROM BOTH EXPERIMENTS.

Freddy CallensFiliep MaesEtienne Boesman

A1 Journal Article in PHYSICAL REVIEW B-CONDENSED MATTER

TRANSIENT MICROWAVE PHOTOCONDUCTIVITY AND COMPUTER-SIMULATION STUDY OF IR3+-DOPED AND RH3+-DOPED AGCL MICROCRYSTALS.

Freddy CallensFelix Cardon

A1 Journal Article in JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY

1994

An EPR study and spin Hamiltonian analysis of a new SSE defect in NaCl.

Filiep MaesFreddy CallensPeter MoensPaul MatthysEtienne Boesman

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

COMPUTER-SIMULATION OF TRANSIENT MICROWAVE PHOTOCONDUCTIVITY IN SILVER-HALIDE MICROCRYSTALS.

Freddy CallensFelix Cardon

A1 Journal Article in JOURNAL OF IMAGING SCIENCE AND TECHNOLOGY

ENDOR Study of RbCl-S2.

Filiep MaesFreddy CallensPeter MoensEtienne Boesman

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

EPR study of NACLCO2- and NACLSO2-.

Peter MoensFreddy CallensFiliep MaesPaul Matthys

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

EPR study of carbonate derived and ozonide radicals in carbonated apatites synthesized from aqueous-solutions.

Peter MoensFreddy CallensPaul MatthysEtienne BoesmanRonald Verbeeck

A1 Journal Article in APPLIED MAGNETIC RESONANCE

Electron-Paramagnetic-Resonance of an 03-Ion Trapped in KI.

Peter MoensFreddy CallensFiliep MaesPaul Matthys

A1 Journal Article in PHYSICA STATUS SOLIDI B-BASIC RESEARCH

Location and Motion of Isotropie Paramagnetic Centres in Synthetic Monohydrocalcite.

Freddy CallensPeter Moens

A1 Journal Article in JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS

P-31 AND H-1 powder ENDOR and molecular orbital study of a CO33- ion in X-irradiated carbonate containing hydroxyapatites.

Peter MoensFreddy CallensPaul MatthysRonald Verbeeck

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

1993

AN EPR-SPECTRUM DECOMPOSITION STUDY OF PRECIPITATED CARBONATED APATITES (NCAP) DRIED AT 25-DEGREES-C - ADSORPTION OF MOLECULES FROM THE ATMOSPHERE ON THE APATITE POWDERS.

Peter MoensFreddy CallensRonald Verbeeck

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

DETERMINATION OF THE CONCENTRATION OF INTERSTITIAL SILVER IONS IN SILVER-HALIDE EMULSION GRAINS BY MEANS OF DIELECTRIC-LOSS MEASUREMENTS - DIFFICULTIES OF INTERPRETATION.

Freddy CallensLeen SoensFelix Cardon

A1 Journal Article in JOURNAL OF PHOTOGRAPHIC SCIENCE

ESR STUDY OF C-13-ENRICHED CARBONATED CALCIUMAPATITES PRECIPITATED FROM AQUEOUS-SOLUTIONS.

Freddy CallensRonald VerbeeckPaul MatthysEtienne Boesman

A1 Journal Article in CALCIFIED TISSUE INTERNATIONAL

MAXIMUM-LIKELIHOOD COMMON-FACTOR ANALYSIS AS A POWERFUL TOOL IN DECOMPOSING MULTICOMPONENT EPR POWDER SPECTRA.

Peter MoensBert HoogewijsFreddy CallensRonald Verbeeck

A1 Journal Article in JOURNAL OF MAGNETIC RESONANCE SERIES A

SPECTRUM DECOMPOSITION THROUGH MAXIMUM-LIKELIHOOD COMMON FACTOR-ANALYSIS OF THE EPR-SPECTRA OF NA+ CONTAINING CARBONATED APATITES DRIED AT 400-DEGREES-C.

Ronald VerbeeckFreddy Callens

A1 Journal Article in CALCIFIED TISSUE INTERNATIONAL

STUDY OF INTRINSIC ENERGY-DEPENDENCE OF ALPHA-ALANINE AND DOSE INTERCOMPARISON WITH ESR AND ISE TECHNIQUES.

Koenraad Van LaereFreddy Callens

A1 Journal Article in APPLIED RADIATION AND ISOTOPES

Temperature dependence of 03-electron paramagnetic resonance signals in KCI.

Freddy CallensPeter MoensFiliep MaesEtienne Boesman

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

1992

A FAST METHOD FOR FITTING THE G-TENSOR OF EPR POWDER SPECTRA USING THE LEVENBERG-MARQUARDT ALGORITHM.

Freddy CallensPaul MatthysFiliep MaesEtienne Boesman

A1 Journal Article in BULLETIN DES SOCIETES CHIMIQUES BELGES

EPR OF TRICLINIC FE CENTERS IN KCL AND RBCL.

Freddy CallensFiliep MaesPaul MatthysEtienne Boesman

A1 Journal Article in PHYSICA STATUS SOLIDI B-BASIC RESEARCH

EPR of S2' in RbCl and RbBr

Freddy CallensFiliep MaesPaul MatthysPeter MoensEtienne Boesman

A2 Journal Article in Phys. Stat. Sol., 170, pp. 609-613, 2 figg

EPR of S2- in RbCl and RbBr.

Filiep MaesPaul MatthysFreddy CallensPeter MoensEtienne Boesman

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

Electron paramagnetic resonance of phosphate-derived radicals in KCL.

Freddy CallensFiliep MaesPeter MoensPaul MatthysEtienne Boesman

A1 Journal Article in JOURNAL OF PHYSICS-CONDENSED MATTER

THE SPIN HAMILTONIAN OF THERMAL DONORS IN GERMANIUM.

Freddy CallensPaul ClauwsPaul Matthys

A1 Journal Article in SOLID STATE COMMUNICATIONS

The spin hamiltonian of thermal donors in germanium

Freddy CallensPaul ClauwsPaul Matthys

1991

Adsorption of carbonate-derived molecules on the surface of carbonate-containing apatites.

Peter MoensFreddy CallensPaul MatthysFiliep MaesRonald Verbeeck

A1 Journal Article in JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS

Bistability of thermal donors in germanium: assignment of far-infrared and electron-paramagnetic-resonance spectra

Paul ClauwsFreddy CallensFiliep MaesEtienne Boesman

A2 Journal Article in Phys. Rev. B, 44, pp. 3665-3672, 4 figg

EPR of See- in NaBr

Filiep MaesPaul MatthysFreddy CallensEtienne Boesman

Electron paramagnetic resonance of a Co2~ radical trapped in KBr

Peter MoensPaul MatthysFreddy CallensFiliep MaesEtienne Boesman

A2 Journal Article in Phys. Stat. Sol., (b), 168, pp. 289-296, 5 figg

Electron paramagnetic resonance study of S- and S3- in RbCl

Filiep MaesFreddy CallensPaul Matthys

The effect of carbonate content and drying temperature on the ESR-spectrum near G=2 of carbonated calciumapatites synthesized from aqueous-media

Freddy CallensRonald VerbeeckPaul Matthys

A1 Journal Article in CALCIFIED TISSUE INTERNATIONAL

1983

Ionaire en elektronische geleiding in zilverhalogenide-microkristallen

ESR study of 1:^C enriched carbonated calciumapatites precipitaded from aqueous solutions. Calcif. Tissue Int. 52, (1993) 386-391.

Freddy CallensRonald VerbeeckPaul MatthysEtienne Boesman

Study of elephant tooth enamel from the Kärlich-Seeufer site in Germany.

A2 Journal Article in APPLIED RADIATION AND ISOTOPES