Methodological Study on Change in Half Life of 210po Embedded in a Metallic Medium at Ultra-Low Temperature  

作　　者：DONG Ke-Jun JIANG Shan HE Ming HE Xian-Wen RUAN Xiang-Dong GUAN Yong-Jing LIN De-Yu YUAN Jian WU Shao-Yong 董克君;姜山;何明;何贤文;阮向东;管永精;林德雨;袁坚;武绍勇(China Institute of Atomic Energy,P.O.Box 275(50),Beijing 102413;College of Physics Science and Technology,Guangxi University,Nanning 530004)

机构地区：[1]China Institute of Atomic Energy,P.O.Box 275(50),Beijing 102413 [2]College of Physics Science and Technology,Guangxi University,Nanning 530004

出　　处：《Chinese Physics Letters》2012年第7期64-66,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10875177.

摘　　要：It has been claimed that the half-life of radioactive nuclides embedded in metals may be significantly affected by the screening of quasi-free electrons provided by the metals,especially at the cryogenic temperature.We determine the α-decay half-life values of 210 po in high purity metallic bismuth at 4.2 K and 293 K.The results show that the α-decay half-life of 210Po at T =4.2 K is about (24 ±8)% shorter than that at room temperature.

关 键 词：temperature METALS DECAY 

分 类 号：O57[理学—粒子物理与原子核物理]