少参数核质量公式及核质量计算  

A Mass Formula with a Few Free Parameters and Nuclear Mass Calculations

作　　者：甘再国[1] 黄业成[1] 

机构地区：[1]中国科学院近代物理研究所,兰州730000

出　　处：《高能物理与核物理》1992年第2期172-177,共6页High Energy Physics and Nuclear Physics

摘　　要：本文介绍一个少参数的原子核质量公式,并用它计算了28≤Z≤81的1440个原子核质量和1250个核的双中子分离能S_(2n),与实验比较,核质量和S_(2n)的方均根偏差分别为1.01MeV和0.57MeV。理论的双中子分离能曲线很好地重现了N=50、82的主壳效应和Z=40时N=56的亚壳效应,以及N≥60和90时的原子核发生大形变的特性。A mass formula with deformation and shell corrections for a few free parameters was described. By means of the formula the calculations of 1440 nuclear masses and 1250 two neu- tron separation energies S_(2n). in the region of 28≤2≤81 were performed. The root--mean--square deviations are respectively 1. 01 MeV for nuclear masses and 0. 57MeV for S_(2n). The results of the theory could also reproduce the characters of the closure shell, the subshell and the deformation of the nuclei.

关 键 词：原子核 质量公式 双中子分离能 

分 类 号：O571.22[理学—粒子物理与原子核物理]