F-H Center Formation by the Optical Conversion in Self Trapped Excitons in KCl Crystal
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概要
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The formation of F and If centers tmder the double excitation by a pulsedelectron beam and a Q-switched ruby laser has been observed in KCI crystalsbetween 5 K and 16.5 K. The efficiency of the F center formation due to theconversion of the self trapped exciton (STE) from the 'I: (o., Nso.) state to ahigher state, possibly to the 'H.(o., 2pn.) state, is as high as 0.35 -0.50 in thistemperature range, and the efficiency of the back conversion 'II.+'I: is verysmall. This small efficiency suggests a process faster than the 'H.-+'I: transition,supporting fast formation time of F centers (11 -3-9 ps) in KCI. Rest of the STE,i.e. 65 '3 -50 'Q of them, appear to go down to the ground "I: state nonradiatively.A possible formation process of F and H centers is discussed.
- 社団法人日本物理学会の論文
- 1978-09-15
著者
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YOSHINARI Takehisa
Department of Physics, Faculty of Science, Yamagata University
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HIRAI Masamitsu
Department of Applied Physics,Faculty of Engineering,Tohoku University
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Yoshinari Takehisa
Department Of Physics Faculty Of Science Tohoku University
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IWANO Hideaki
Department of physics,Faculty of Science,Tohoku University
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Iwano Hideaki
Department Of Physics Faculty Of Science Tohoku University
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Hirai Masamitsu
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Hirai Masamitsu
Department of Physics,Faculty of Science,Tohoku University
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