Temperature Dependence of Positron Trapping to Dislocations in Aluminum
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概要
- 論文の詳細を見る
Doppler-broadening lineshapes of positron annihilation in high purity aluminumhave been measured as a function of temperature between 4.2 and 275 K after defor-mation and recovery at room temperature. The effective trapping rate exhibits astrongly negative dependence on temperature below 200 K in material of 99.9999%purity, but only below 70 K in 99.999% purity. The results can be explained with amodel where positrons become trapped in deep traps (e.g., jogs) via shallow traps(dislocation lines) from which thermal detrapping can occur. The temperaturedependence of the effective trapping rate found in material of 99.999% purity is at-tributed to the temperature dependence of the specific trapping rate to the dislocationline.positron annihilation, dislocations, aluminum
- 社団法人日本物理学会の論文
- 1991-09-15
著者
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紀 隆雄
広島国際学院大学工学部
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Hashimoto Eiji
Laboratory Of Crystal Physics Faculty Of Science Hiroshima University
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Kino Takao
Laboratory Of Crystal Physics Faculty Of Science Hiroshima Univ.
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