Theoretical study of the central depression of nuclear charge density distribution by electron scattering  

作　　者：刘健 褚衍运 任中洲 王再军 

机构地区：[1]Department of Physics,Nanjing University [2]Center of Theoretical Nuclear Physics,National Laboratory of Heavy-Ion Accelerator [3]Department of Mathematics,Physics and Information Science,Tianjin University of Technology and Education

出　　处：《Chinese Physics C》2012年第1期48-54,共7页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10775068,10735010,10975072,11035001);973 National Major State Basic Research and Development of China (2007CB815004,2010CB327803);CAS Knowledge Innovation Project (KJCX2-SW-N02);Research Fund of Doctoral Point (RFDP) (20070284016,20100091110028)

摘　　要：The charge form factors of elastic electron scattering for isotones with N=20 and N=28 are calculated using the phase-shift analysis method,with corresponding charge density distributions from relativistic mean-field theory.The results show that there are sharp variations at the inner parts of charge distributions with the proton number decreasing.The corresponding charge form factors are divided into two groups because of the unique properties of the s-states wave functions,though the proton numbers change uniformly in two isotonic chains.Meanwhile,the shift regularities of theminima are also discussed,and we give a clear relation between theminima of the charge form factors and the corresponding charge radii.This relation is caused by the diffraction effect of the electron.Under this conclusion,we calculate the charge density distributions and the charge form factors of the A=44 nuclei chain.The results are also useful for studying the central depression in light exotic nuclei.The charge form factors of elastic electron scattering for isotones with N=20 and N=28 are calculated using the phase-shift analysis method,with corresponding charge density distributions from relativistic mean-field theory.The results show that there are sharp variations at the inner parts of charge distributions with the proton number decreasing.The corresponding charge form factors are divided into two groups because of the unique properties of the s-states wave functions,though the proton numbers change uniformly in two isotonic chains.Meanwhile,the shift regularities of theminima are also discussed,and we give a clear relation between theminima of the charge form factors and the corresponding charge radii.This relation is caused by the diffraction effect of the electron.Under this conclusion,we calculate the charge density distributions and the charge form factors of the A=44 nuclei chain.The results are also useful for studying the central depression in light exotic nuclei.

关 键 词：elastic electron scattering RMF model phase-shift analysis central depression 

分 类 号：O571.2[理学—粒子物理与原子核物理]