Compressional and toroidal dipole modes in nuclei
Compressional and toroidal dipole modes in nuclei
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原子核中的压缩和环形偶极子模式
DOI：
10.1088/0954-3899/29/4/312
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
P. Alexa
中科院分区：
文献类型：
--
作者：
J. Kvasil;N. Iudice;C. Stoyanov;P. Alexa
利用不同的可分哈密顿量研究了质子-中子随机相近似中的核电等标量偶极子响应，并与现有实验数据进行了详细的比较。对不同哈密顿量的响应的分析揭示了以前的现实方法无法直接获得的压缩偶极子模式的特性，从而确定了这些计算与实验之间差异的一些原因。从这个角度来看，我们还研究了环面算符的结构，它与纯偶极子场和压缩偶极子场的关系，并计算了它对偶极子响应的贡献。
We studied the nuclear electric isoscalar dipole response in proton–neutron random-phase approximation using different separable Hamiltonians and carried out a detailed comparison with the available experimental data. The analysis of the response to the different pieces of the Hamiltonian has disclosed properties of the compressional dipole mode not directly accessible to previous realistic approaches and, thereby, has identified some of the reasons of the discrepancies between these calculations and the experiments. In this perspective we have also studied the structure of the toroidal operator, its relation to the pure and compressional dipole fields, and computed its contribution to the dipole response.