Luminescence from Self-Trapped Excitons in KBr:Na
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概要
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Luminescence from KBr containing Na^+ ions (3×10^<-5>-9×10^<-2> mol fraction) is investigated at 10 K either by exciting crystals with the UV light or the F band light in X-rayed crystals. Emission bands related to Na^+ ions are identified at 2.72 and 2.90eV; both of them polarize perpendicular to the V_K type molecular axis. Their decay times obtained with an N_2 laser excitation are 35 and 24 μs, respectively. It is concluded that the Na emission is π-type emission from a self-trapped exciton, (V_K+e)^*, perturbed by Na~+ ion. Relative intensity of the 2.72eV band to the 2.90eV band varies depending upon the excitation energies and the thermal history of X-rayed crystals. This means that at least two types of the V_<KA> center with defferent thermal stabilities should be assumed.
- 社団法人日本物理学会の論文
- 1976-12-15
著者
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NAKAMURA Kaizo
Department of Physics,Faculty of Science,Okayama University
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NAKAI Yoshio
Department of Physics,Kyoto University
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TOYODA Koichi
Department of Physics, Faculty of Science, Tokai University
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Nakai Yoshio
Department Of Physics Kyoto University
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Nakai Yoshio
Department Of Physics Faculty Of Science Kyoto University
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Toyoda Koichi
Department Of Physics Osaka Dental University
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Nakamura Kaizo
Department Of Physics Faci4ty Of Science Kyoto University
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Nakai Yoshio
Department Of Physics Faculty Of Scicncc Kyoto University
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Toyoda Koichi
Department Of Applied Electronics Faculty Of Industrial Science & Technology Science University
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Nakamura Kaizo
Department of Physics,Kyoto University
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