Model for low-temperature luminescence in lithium- and sodium-doped beryllium oxide single crystals

Journal Article · Sun Sep 15 04:00:00 EDT 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335950· OSTI ID:5386123

Cooke, D W; Jahan, M S; Jr, Alexander C; Shul'gin, B V

BeO:Li and BeO:Na single crystals have been investigated by thermoluminescence (TL) techniques in the interval 10--300 K. X-irradiated BeO:Na exhibits an intense glow peak at 85 K and a weak one near 46 K. BeO:Li displays intense glow at 72 K. Analyses of the two strong peaks (the weak one was not amenable to analysis) yield the following TL parameters: T/sub m/ = 72 K, E = 0.143 eV, s = 1.08 x 10/sup 8/ sec/sup -1/, and l = 1.3; T/sub m/ = 85 K, E = 0.197 eV, s = 1.05 x 10/sup 10/ sec/sup -1/, and l = 1.2, where E is the thermal activation energy, s is the frequency factor, and l is the order of kinetics. Spectral emission from the two intense glow peaks were similar, characterized by band emission with maxima near 320 and 525 nm. A model consistent with previous TL and magnetic resonance results which adequately describes our data is presented. It is suggested that the main glow peaks are due to holes released at V centers whereby they recombine with F and F/sup +/ centers. Recombination at the F center yields 525-nm radiation whereas recombination at the F/sup +/ defect produces 320-nm emission. Optical excitation, photobleaching, and phototransfer experiments support this model.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5386123
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
BERYLLIUM COMPOUNDS
BERYLLIUM OXIDES
BLEACHING
CHALCOGENIDES
CHARGED PARTICLES
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL DOPING
CRYSTAL STRUCTURE
DOPED MATERIALS
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
ENERGY
ENERGY-LEVEL TRANSITIONS
EXCITATION
F CENTERS
HOLES
IONIZING RADIATIONS
IONS
LITHIUM IONS
LOW TEMPERATURE
LUMINESCENCE
MATERIALS
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
POINT DEFECTS
RADIATIONS
RECOMBINATION
SODIUM IONS
SPECTRA
THERMOLUMINESCENCE
ULTRALOW TEMPERATURE
VACANCIES
VERY LOW TEMPERATURE
VISIBLE SPECTRA
X RADIATION