Positron Annihilation in Germanium in Thermal Equilibrium at High Temperature
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概要
- 論文の詳細を見る
Annihilation characteristics of positrons in Ge in thermal equilibrium at high temperature were studied using a monoenergetic positron beam. Precise measurements of Doppler broadening profiles of annihilation radiation were performed in the temperature range between 300 K and 1211 K. The line shape parameters of Doppler broadening profiles were found to be almost constant at 300–600 K. The changes in these parameters were observed to start above 600 K. This was attributed to both the decrease in the fraction of positrons annihilating with core electrons and the lowering of the crystal symmetry around the region detected by positron-electron pairs. This suggests that behaviors of positrons are dominated by some form of positron-lattice coupling in Ge at high temperatures. The temperature dependence of the diffusion length of positrons was also discussed.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 1996-09-15
著者
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Kawano Takao
Radioisotope Center University Of Tsukuba
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Ikari Atsushi
Advanced Technology Research Laboratories Nippon Steel Corporation
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Tanigawa Shoichiro
Institute Of Applied Physics University Of Tsukuba
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Moriya Tsuyoshi
Institute Of Material Science University Of Tsukuba
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Komuro Naoyuki
Institute Of Materials Science University Of Tsukuba
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Uedono Akira
Institute of Applied Physics and Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Japan
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Moriya Tsuyoshi
Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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Ikari Atsushi
Advanced Technology Research Laboratories, Nippon Steel Corporation, 3434 Shimata, Hikari 743, Japan
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Kawano Takao
Radioisotope Center, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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