相对论Hartree-Fock研究奇特核的性质  

Investigation of Properties of Exotic Nuclei in Relativistic Hartree-Fock Theory

作　　者：陈宝秋[1] 马中玉[2] 

机构地区：[1]兰州重离子加速器国家实验室原子核理论中心,兰州730000 [2]中国原子能科学研究院核物理所,北京102413

出　　处：《高能物理与核物理》2001年第4期309-314,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 !( 1 0 0 750 80 ;1 984 70 0 2 ;1 983 50 1 0 ) ;国家重点基金;研究发展规划 (G2 0 0 0 774 0 7)和核工业基金!

摘　　要：采用相对论Hartree Fock (RHF)理论来描述奇特核的性质 .为了研究Fock项和矢量介子对奇特核性质的贡献和避免有效相互作用的不惟一性 ,本文推广应用没有自由参数的密度有关的相对论Hartree (RDH)和Hartree Fock(RDHF)理论来描述奇特核的性质 .在RDH和RDHF近似下 ,计算了钙同位素链的性质 ,特别研究了Fock交换项和矢量介子的贡献 .研究表明交换项和矢量介子对非常丰中子核的性质 ,如结合能 ,中子均方根半径 ,中子密度分布的影响是非常不同于对稳定线附近核性质的影响 .同时 ,对研究滴线奇特核性质的重要性及其理论模型做了简单的讨论 .Relativistic Hartree Fock (RHF) theory has been adopted to describe properties of exotic nuclei. In order to investigate the contribution of Fock term and isovector mesons to the properties of exotic nuclei and to avoid effective interaction which is not unique, the density dependent relativistic Hartree (RDH) and relativistic Hartree Fock(RDHF) theories with parameter free have been extended to describe the properties of exotic nuclei. The properties of Calcium isotope chain are calculated in the RDH and RDHF approaches, and the contribution of the Fock term and isovector mesons to the properties have been investigated particularly. It turns out that the influence of the Fock term and isovector mesons on the properties of neutron very rich nuclei, such as binding energies, RMS of neutron radius and distribution of neutron density, is very different from those of stable nuclei. We also briefly discuss importance of study on the properties of nuclei near drip line and the theoretical model used in this paper.

关 键 词：奇特核 相对论Hartree-Fock理论 矢量介子 交换项 结合能 核物理 放射性核束装置 中子均方根半径 中子密度分布 

分 类 号：O571[理学—粒子物理与原子核物理]