Published July 2000
| Version v1
Journal article
Study on mechanism of green luminescence in PbWO4 crystal by positron annihilation lifetime spectrum
Creators
- 1. Tongji Univ., Shanghai (China)
- 2. Academia Sinica, Shanghai (China). Laboratory of Functional Inorganic Materials
- 3. Shanghai Key Laboratory of Metal-Functional Materials, Shanghai (China)
Description
The change of the defects in PbWO4 crystals before and after annealing was studied by positron annihilation lifetime spectrum. It was found that the lifetime τ2 turned short and the positron capture ability κ increased after oxygen annealing. The results for the case of vacuum annealing were the reverse for that of oxygen annealing. Meanwhile, the main emission peak of the crystal after oxygen annealing shifted from 440 nm to 485 nm, but the peak for the case of vacuum annealing remained at 440 nm, i.e. similar to that of an untreated crystal. From the results affected by different treatments, it is proposed that WO3 + O- produced by lead vacancy leads to the green luminescence in PbWO4 crystal
Additional details
Publishing Information
- Journal Title
- Nuclear Techniques
- Journal Volume
- 23
- Journal Issue
- 7
- Journal Page Range
- p. 433-436
- ISSN
- 0253-3219
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 32040312
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANNEALING; ANNIHILATION; CAPTURE; CRYSTALS; EMISSION SPECTROSCOPY; LEAD TUNGSTATES; LIFETIME; LUMINESCENCE; OXYGEN; POSITRONS; VACANCIES; VACUUM STATES
- Descriptors DEC
- ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; ELEMENTARY PARTICLES; ELEMENTS; EMISSION; FERMIONS; HEAT TREATMENTS; INTERACTIONS; LEAD COMPOUNDS; LEPTONS; MATTER; NONMETALS; OXYGEN COMPOUNDS; PARTICLE INTERACTIONS; PHOTON EMISSION; POINT DEFECTS; REFRACTORY METAL COMPOUNDS; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS; TUNGSTATES; TUNGSTEN COMPOUNDS