Effects of X-ray irradiation on BaFBr single crystals at LHeT
- 1. Department of Applied Physics, Tohoku University, Aobaku, Sendai 980 (Japan)
- 2. Fuji Photo Film Co., Ltd., Miyanodai, Kaisei, Ashigarakami, Kanagawa 258 (Japan)
Description
Color center formation and luminescence excitation in BaFBr single crystals by X-ray irradiation was studied at low temperatures. F(Br-) centers formed by X-irradiation at LHeT showed an absorption band at 2.09 eV at LHeT. This peak energy is different from those of isolated F(Br-) centers, suggesting formation of F centers perturbed by nearby impurities or defects. A dichroic absorption band due to self-trapped holes, VK(Br2-) centers, was observed at 3.35 eV. The dichroism of the VK(Br2-) band diminished above 110 K. Three luminescence bands were observed at 5.2, 3.9, and 2.5 eV when BaFBr single crystals were X-irradiated at LHeT. Among these luminescence bands, the 5.2 eV band can be attributed to the recombination of VK centers with electrons. ((orig.))
Additional details
Publishing Information
- Journal Title
- Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms
- Journal Volume
- 91
- Journal Issue
- 1-4
- Journal Page Range
- p. 219-222.
- ISSN
- 0168-583X
- CODEN
- NIMBEU
Conference
- Title
- 7. international conference on radiation effects in insulators (REI-7).
- Dates
- 6-10 Sep 1993.
- Place
- Nagoya (Japan).
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 26019137
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ABSORPTION SPECTRA; BARIUM BROMIDES; BARIUM FLUORIDES; COLOR CENTERS; CRYSTAL DEFECTS; DICHROISM; ENERGY LEVELS; EXCITATION; EXCITONS; F CENTERS; IMPURITIES; LUMINESCENCE; MONOCRYSTALS; PHOTOLUMINESCENCE; PHYSICAL RADIATION EFFECTS; POTASSIUM BROMIDES; RECOMBINATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0065-0273 K; TIME DEPENDENCE; TRAPPING; TRAPS; V CENTERS; X RADIATION
- Descriptors DEC
- ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BROMIDES; BROMINE COMPOUNDS; CRYSTAL STRUCTURE; CRYSTALS; ELECTROMAGNETIC RADIATION; EMISSION; ENERGY-LEVEL TRANSITIONS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IONIZING RADIATIONS; PHOTON EMISSION; POINT DEFECTS; POTASSIUM COMPOUNDS; QUASI PARTICLES; RADIATION EFFECTS; RADIATIONS; SPECTRA; TEMPERATURE RANGE; VACANCIES