Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305

作     者：ZHANG Jiang WANG Bo ZHANG Bo HAN Zhan-Wen 张江;王博;张波;韩占文

作者机构：National Astronomical Observatories/Yunnan ObservatoryChinese Academy of SciencesKunming 650011 Key Laboratory for the Structure and Evolution of Celestial ObjectsChinese Academy of SciencesKunming 650011 School of Mathematics and ScienceShijiazhuang University of EconomicsShijiazhuang 050016 Department of PhysicsHebei Normal UniversityShijiazhuang 050016 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2012年第29卷第1期

页      面：299-302页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 10973006,10821061,11033008,11103072,10973036 and 11003002 the National Basic Research Program of China under Grant No 2009CB824800 the Knowledge Innovation Program of the Chinese Academy of Sciences under Grant No KJCX2-YW-T24 

主　　题：elements Mixture analysis 

摘      要：The neutron-capture process is traditionally postulated to be responsible for the nucleosynthesis of heavy elements beyond *** on theleast squares method and solar isotopic abundances from the classical model,we estimate the relative contributions of the s- and r-processes to the abundance of neutron-capture elements in the metalpoor star HD 175305 from the component *** the calculated component coefficients C_(r) and C_(s),the model predicts the isotopic fractions of elements Nd,Sm and Eu to be f_(142+144) =0.482,f_(152+154) =0.525 and f_(l51) =0.450,*** well as the observed abundances,the isotropic fractions are also consistent with the ***,for the first time,we estimated the contribution percentage of the two neutron processes (the r- and s-processes) from the observed isotopic fractions of different elements in HD 175305,*** r-process contribution of 67%^(+21%)_(-32%) from the 4604 (A) line of Sm.