【摘要】 本文用不同的方法计算了⁴⁰Ca和¹²C的自旋横向响应函数.用含有△自由度的耦合的极化传播子的RP_A方程研究了△-isobar对响应强度的影响,结果表明它使响应函数减小.在引入体现着多体效应的能量依赖的有效核子质量后,得到了满意的结果.更多还原

【Abstract】 The spin transverse response functions for ⁴⁰Ca and ¹²C in different approximations have been calculated. By using the coupled RPA equations for polarization propagator including the delta degree of freedom, the influence of the delta on the response function has been investigated. The results show that they are reduced explicitly. Introducing the energy dependent effective nucleon mass, which embodies the manybody ef ects, the satisfactory results are obtained.更多还原