以改进的定域密度近似研究核子-有限核的相对论微观光学势  

RELATIVISTIC MICROSCOPIC OPTICAL POTENTIALS FOR NUCLEON-NUCLEUS IN THE IMPROVED LOCAL DENSITY APPROXIMATION

作　　者：朱萍[1] 徐加豹[1] 高琴 

机构地区：[1]杭州大学物理系,杭州310028

出　　处：《物理学报》1993年第1期9-16,共8页Acta Physica Sinica

基　　金：浙江省自然科学基金

摘　　要：本文以Walecka模型为基础,研究改进的定域密度近似下的核子-有限核的相对论微观光学势。采用高斯形状因子折叠定域密度近似下的光学势,得到包含相互作用力程效应的改进的定域密度近似下的光学势。高斯形状因子中的参数由符合P-^(40)Ca光学势的体积分与均方根半径的唯象值来决定。与定域密度近似计算相比,改进的定域密度近似下的微观光学势与唯象势更加接近,以此光学势分析质子与核的弹性散射,亦得到与实验值符合得更好的结果。Based on Walecka model, the refativistic microscopic optical potentials (RMOP) for nu-cleon-nucleus are investigated in the improved local density approximation (ILDA). The RMOP in ILDA, which include the effect of interaction range, are obtained by folding RMOP in LDA with Gaussian form factors. The parameters in Gaussian form factors are adjusted to fit the empirical values of the volume integral and root mean squar radius of the optical potential for p-Ca. By analysing the elastic scattering of proton from nuclei, we get a better agreement of ILDA with experiment data than that of LDA.

关 键 词：核子 弹性散射 光学势 定域密度 

分 类 号：O572[理学—粒子物理与原子核物理]