相对论平均场理论对新核素^(259)Db及其α衰变链的研究  

Description of the New Nuclide ^(259)Db and Its α-Decay Chain in Relativistic Mean Field Theory

作　　者：龙文辉[1] 孟杰[1] 周善贵[1] 

机构地区：[1]北京大学物理学院,北京100871

出　　处：《高能物理与核物理》2002年第8期823-830,共8页High Energy Physics and Nuclear Physics

基　　金：国家重点基础研究发展规划 (G2 0 0 0 0 7740 7) ;国家自然科学基金 (1 0 0 2 5 5 2 2 ;1 98470 0 2 ;1 993 5 0 3 0 )资助~~

摘　　要：利用相对论平均场理论系统地探讨了新核素2 5 9Db及其α衰变链的性质和结构以及对关联效应与形变效应的影响 .考虑对关联影响后的变形相对论平均场理论成功再现了实验的Qα 并揭示了所研究的α衰变链具有较大的形变 .在此基础上进一步讨论了新核素2 5The new nuclide 259 Db and its α decay chain are systematically studied in the framework of the relativistic mean field (RMF) theory with NL3 and TM1 effective interactions. The nuclide 259 Db and its α decay daughter nuclei are calculated in a RMF framework with and without the pairing correlation. With the pairing gaps obtained from the RCHB, the deformed RMF+BCS has been carried out for these nuclei. It has been found that the DRMF+BCS well reproduces the data and implies that the new nuclide 259 Db and its α decay daughter nuclei are highly deformed. The α decay energy Q α for different channel has been given and it seems that the ground state to ground state Q α values from DRMF+BCS reproduce the data well. Furthermore the single particle levels of the α decay chain are studied carefully and the explanation for the stability is also presented.

关 键 词：^259Db 相对论平均场 超重元素 形变 对关联 Α衰变链 能级结构 

分 类 号：O571.3[理学—粒子物理与原子核物理]