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Title: Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu{sup 2+} medical imaging plates

Abstract

CsBr:Eu{sup 2+} needle image plates exhibit an electron-paramagnetic-resonance (EPR) spectrum at room temperature (RT), whose intensity is correlated with the photostimulated luminescence sensitivity of the plate. This EPR spectrum shows a strong temperature dependence: At RT it is owing to a single Eu{sup 2+} (S =7/2) center with axial symmetry, whereas at T<35 K the spectra can only be explained when two distinct centers are assumed to be present, a minority axial center and a majority center with nearly extremely rhombic symmetry. In this paper these low-temperature centers are studied with electron nuclear double resonance (ENDOR) spectroscopy, which reveals the presence of {sup 1}H nuclei close to the central Eu{sup 2+} ions in the centers. Analysis of the angular dependence of the ENDOR spectra allows to propose models for these centers, providing an explanation for the observed difference in intensity between the spectral components and for their temperature dependence.

Authors:
; ; ;  [1]; ;  [2]
  1. Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, B-9000 Gent (Belgium)
  2. Agfa HealthCare NV, Septestraat 27, B-2640 Mortsel (Belgium)
Publication Date:
OSTI Identifier:
21538106
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevB.83.054102; (c) 2011 American Institute of Physics; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AXIAL SYMMETRY; CESIUM BROMIDES; DOPED MATERIALS; ELECTRON SPIN RESONANCE; ENDOR; EUROPIUM ADDITIONS; EUROPIUM IONS; HYDROGEN 1; IMAGES; PHOTOLUMINESCENCE; PLATES; SENSITIVITY; SPECTRA; SPECTROSCOPY; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; ALKALI METAL COMPOUNDS; ALLOYS; BROMIDES; BROMINE COMPOUNDS; CESIUM COMPOUNDS; CHARGED PARTICLES; EMISSION; EUROPIUM ALLOYS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN ISOTOPES; IONS; ISOTOPES; LIGHT NUCLEI; LUMINESCENCE; MAGNETIC RESONANCE; MATERIALS; NUCLEI; ODD-EVEN NUCLEI; PHOTON EMISSION; RARE EARTH ADDITIONS; RARE EARTH ALLOYS; RESONANCE; STABLE ISOTOPES; SYMMETRY; TEMPERATURE RANGE

Citation Formats

Vrielinck, H, Loncke, F, Matthys, P, Callens, F, Tahon, J -P, and Leblans, P. Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu{sup 2+} medical imaging plates. United States: N. p., 2011. Web. doi:10.1103/PHYSREVB.83.054102.
Vrielinck, H, Loncke, F, Matthys, P, Callens, F, Tahon, J -P, & Leblans, P. Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu{sup 2+} medical imaging plates. United States. https://doi.org/10.1103/PHYSREVB.83.054102
Vrielinck, H, Loncke, F, Matthys, P, Callens, F, Tahon, J -P, and Leblans, P. 2011. "Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu{sup 2+} medical imaging plates". United States. https://doi.org/10.1103/PHYSREVB.83.054102.
@article{osti_21538106,
title = {Electron nuclear double resonance study of photostimulated luminescence active centers in CsBr:Eu{sup 2+} medical imaging plates},
author = {Vrielinck, H and Loncke, F and Matthys, P and Callens, F and Tahon, J -P and Leblans, P},
abstractNote = {CsBr:Eu{sup 2+} needle image plates exhibit an electron-paramagnetic-resonance (EPR) spectrum at room temperature (RT), whose intensity is correlated with the photostimulated luminescence sensitivity of the plate. This EPR spectrum shows a strong temperature dependence: At RT it is owing to a single Eu{sup 2+} (S =7/2) center with axial symmetry, whereas at T<35 K the spectra can only be explained when two distinct centers are assumed to be present, a minority axial center and a majority center with nearly extremely rhombic symmetry. In this paper these low-temperature centers are studied with electron nuclear double resonance (ENDOR) spectroscopy, which reveals the presence of {sup 1}H nuclei close to the central Eu{sup 2+} ions in the centers. Analysis of the angular dependence of the ENDOR spectra allows to propose models for these centers, providing an explanation for the observed difference in intensity between the spectral components and for their temperature dependence.},
doi = {10.1103/PHYSREVB.83.054102},
url = {https://www.osti.gov/biblio/21538106}, journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 5,
volume = 83,
place = {United States},
year = {Tue Feb 01 00:00:00 EST 2011},
month = {Tue Feb 01 00:00:00 EST 2011}
}