| Autor: |
Quanli Hu, Victor Grishmanov, Koji Ogikubo, Satoru Tanaka |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 141:392-397 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/s0168-583x(98)00191-8 |
| Popis: |
The luminescence emitted under light ion (H + , He + ) irradiation in Li 2 O single crystal has been measured at 313–773 K by an optical multi-channel detector. The temperature and absorbed dose dependences of the luminescence spectrum were investigated. The luminescence emission in Li 2 O induced by both H + and He + ion beam irradiations was observed at about 5.0–1.8 eV. The luminescence intensity decreased with absorbed dose. This effect is associated with the diminution of the concentration of oxygen vacancies and concentration quenching due to the high damage density and stresses in the ion track region. The luminescence intensity of the 2.35 eV band (F-center aggregates) gradually increases with irradiation dose at temperatures below 423 K. Alternatively, the intensities of the luminescence emissions originated from F + (3.3 eV) and F 2 (2.9 eV) centers increase with irradiation dose in the temperature range of 423–573 K. These phenomena are thought to be connected with the efficient temperature for the generation of different radiation defects. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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