手征对称破缺理论对原子核巨单极和巨四极共振态的研究

A CHIRAL BREAKING FIELD THEORY FOR GIANT MONOPOLE AND QUADRUPOLE STATES OF NUCLEI

在相对论手征对称及其自发破缺模型下，研究了有限核的巨单极和巨四极共振激发态．采用ＴｈｏｒｍａｓＦｅｒｍｉ近似和Ｓｃａｌｉｎｇ坐标方法，讨论了原子核的表面效应及核子分布不均匀性对原子核巨单极和巨四极共振激发态的影响．通过对巨单极和巨四极共振激发能的自洽计算，得到了与实验数据符合得较好的理论计算值．

The isoscalar giant monopole and quadrupole states of finite are studied in a relativistic chiral breaking field theory,with the use of local Lorentz boost and scaling method.The nuclear surface and the density distribution are treated in the relativistic Thormas Fermi approximation. The excitation energies of the giant monopole and quadrupole states are self consistently calculated. The numerical results for the excitation energies are in agreement with experimental data for all nuclei. A theoretical expression of the nuclear radius has been derived , which is in agreement with the empirical formula.