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Photostimulated detection of radiation defects produced by VUV light in BaF2 |
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| Authors: | O Arimoto M Watanabe T Tsujibayashi J Azuma M Kamada S Nakanishi H Itoh M Itoh |
| Institution: | 1. Department of Physics, Kyoto Pharmaceutical University, Kyoto 607-8412, Japan;2. Department of Interdisciplinary Environment, Kyoto University, Kyoto 606-8501, Japan;3. Department of Physics, Osaka Dental University, Hirakata 573-1121, Japan;4. Synchrotron Light Application Center, Saga University, Saga 840-8502, Japan;5. Department of Advanced Materials Science, Kagawa University, Takamatsu 761-0396, Japan;6. Department of Electrical and Electronic Engineering, Shinshu University, Nagano 380-8553, Japan |
| Abstract: | Production of radiation defects in a widely used scintillation material BaF2 has been studied by means of a combination spectroscopy of synchrotron radiation (SR) and laser, in which defects produced by SR irradiation are sensitively detected by observing the luminescence stimulated by laser light. The photostimulated luminescence arises from the recombination of self-trapped holes (VK centers) with electrons released from trapped centers by laser light. The obtained result reveals that the production efficiency of radiation defects is drastically dependent on the excitation photon energy of valence or core excitons. |
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