Transcription of 入門講座 陽電子寿命測定法 - positron-science.org
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入門講座 陽電子寿命測定法 - positron-science.org
2 (2014) 21 27 Japanese Positron Science Society .. Positron lifetime measurement technique . Abstract: The basic principles of the positron lifetime measurement technique are described. The topics are as follows: (1) timing measurements of creation and annihilation of positrons, (2) -ray detector, (3) signal processing for the -ray timing, (4) positron lifetime spectrum, (5) data analysis, and (6) fundamental annihi- lation process. Keywords: positron, positron lifetime, measurement method, ray, -ray detector, scintillation detector, life- time spectrum 1.. 106 107 .. 2.. 1 . 2 . 511 keV 3 0 511 keV . 11 12 .. + .. 22. Na 22 Ne + e+ + e (1).. e 22 Ne .. 22 Ne ps .. MeV .. ps . 22 Na .. 22 Na .. 11 11 23 Na.
斎藤：陽電子寿命測定法 入門講座 表1 陽電子寿命測定に用いられるシンチレーター 種類 速度 発光量 密度 備考 （減衰時間） （NaI(Tl) 比） gcm−3 BaF
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