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

Journal Article · Tue Feb 01 00:00:00 EST 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.054102· OSTI ID:21538106

Vrielinck, H; Loncke, F; Matthys, P; Callens, F ^[1]; Tahon, J -P; Leblans, P ^[2]

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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)

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.

• OSTI ID: 21538106
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevB.83.054102; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

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