The Nuclear Incompressibility and Isoscalar Giant Dipole Resonance in Relativistic Continuum Random Phase Approximation  

作　　者：YANG Ding CAO Li-Gang MA Zhong-Yu 杨丁;曹李刚;马中玉(School of Science,Communication University of China,Beijing 100024;China Institute of Atomic Energy,Beijing 102413;Center of Theoretical Nuclear Physics,National Laboratory of Heavy Collision,Lanzhou 730000;Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000)

机构地区：[1]School of Science,Communication University of China,Beijing 100024 [2]China Institute of Atomic Energy,Beijing 102413 [3]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Collision,Lanzhou 730000 [4]Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000

出　　处：《Chinese Physics Letters》2013年第5期40-43,共4页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China under Grant Nos 11175216 and 11275018;the National Basic Research Program of China under Grant No 2013CB834404;the Science Planning Project of the Communication University of China under Grant No XNL1207.

摘　　要：The isoscalar giant dipole resonance(ISGDR)in nuclei is studied in the framework of a fully self-consistent relativistic continuum random phase approximation(RCRPA).In this method the contribution of the continuum spectrum to nuclear excitations is treated exactly by the single particle Green's function technique.We employ different type interactions(NL1,NL3,NL3^(*),NL4,TM1,NLSH and PK1)corresponding to incompressibilities in the range 200–360 MeV.The results are discussed in comparison with the existing experimental data.It is found that the termη=5/3<r^(2)>can remove spurious components from the admixture of the center of mass state perfectly.The ISGDR distribution has two components,the lower-energy component and the higher-energy component.There is a large amount of very sharp peaks in the lower-energy region in RCRPA calculations.Only the higher-energy component is sensitive to the value of nuclear incompressibility employed in the calculations;the position of the lower-energy component is completely independent of the nuclear incompressibility Knm.

关 键 词：technique SCALAR APPROXIMATION 

分 类 号：O57[理学—粒子物理与原子核物理]