Theoretical investigation of the Gamow-Teller transition across N=40 shell  

作　　者：支启军 宇燕 郑强 

机构地区：[1]School of Physics and Electronics,Guizhou Normal University [2]School of Mathematics and Computer Science,Guizhou Normal University

出　　处：《Chinese Physics C》2011年第11期1022-1025,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (11165006, 10865004, 10775123);Natural Science and Technology Foundation of Guizhou Province ([2008]2254, LKS[2010]08);International Scientific and Technological Cooperation Projects of Guizhou Province ([2011]7026);Doctor Funding of Guizhou Normal University

摘　　要：The Gamow-Teller transitions for pf shell nuclei with proton number less than 40 and neutron number larger than 40 were believed to be blocked, due to the full filling of the neutron orbit. However, recent experimental research shows that the Gamow-Teller transitions for these kinds of nuclei are not blocked. In this paper, we systematically calculate the GT transition of pf shell nuclei 76Se in different truncations, and the results are compared with experimental results. It is shown that, due to correlations, the believed blocked GT transition occurs, and the shell model calculations reproduce the experimental GT strength. In addition, the electron capture rates in a stellar environment are calculated and discussed.The Gamow-Teller transitions for pf shell nuclei with proton number less than 40 and neutron number larger than 40 were believed to be blocked, due to the full filling of the neutron orbit. However, recent experimental research shows that the Gamow-Teller transitions for these kinds of nuclei are not blocked. In this paper, we systematically calculate the GT transition of pf shell nuclei 76Se in different truncations, and the results are compared with experimental results. It is shown that, due to correlations, the believed blocked GT transition occurs, and the shell model calculations reproduce the experimental GT strength. In addition, the electron capture rates in a stellar environment are calculated and discussed.

关 键 词：Gamow-Teller transition electron capture rate shell model 

分 类 号：P157.9[天文地球—天文学]