Photo-stimulated luminescence of KCl:Eu under X-ray and ion irradiation |
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Authors: | M Hashima M Koshimizu K Asai |
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Institution: | aDepartment of Applied Chemistry, Graduate School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan |
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Abstract: | We compared the photo-stimulated luminescence (PSL) process of storage phosphor KCl:Eu under the irradiation of X-ray, 2.0 MeV H+ ions and 2.0 MeV He+ ions. The purpose of the irradiation of H+ and He+ ions was to mimic the irradiation effects of neutrons. In each case, it was revealed that F-centers were involved in the PSL process. We observed an entirely different fluence-dependent PSL behavior between the X-ray and the ion irradiation, whereas the behavior of the F-center absorption was quite similar. This difference was due to the different yields of the trapping sites for the electrons liberated from the F-centers, and the difference in the yield was ascribed to the difference in the excitation density. This result clearly indicated a marked difference in the PSL process under X-ray and neutron irradiations and indicated that the analysis of the PSL process under ion irradiation is highly important for the application of PSL phosphors to neutron radiography. |
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Keywords: | Storage phosphor Photo-stimulated luminescence Radiation detection Neutron |
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