Relativistic nucleon optical potentials with isospin dependence in a Dirac-Brueckner-Hartree-Fock approach
Relativistic nucleon optical potentials with isospin dependence in a Dirac-Brueckner-Hartree-Fock approach
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Dirac-Brueckner-Hartree-Fock 方法中具有同位旋依赖性的相对论核子光势
DOI：
10.1103/physrevc.85.034613
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发表时间：
2012-03
影响因子：
3.1
通讯作者：
Muether, H.
中科院分区：
文献类型：
--
作者：
Xu, Ruirui;Ma, Zhongyu;van Dalen, E. N. E.;Muether, H.
在Dirac-Brueckner-Hartree-Fock（DBHF）方法的框架下，使用裸核子-核子相互作用的Bonn-B单玻色子交换势，研究了核子-核散射的相对论光学模型势（OMP）。基于减T -矩阵表象中的投影技术，用DBHF方法导出了核介质中同位旋相关核子自能的真实的实部和虚部。狄拉克势以及相应的薛定谔等效势的评估。在这个分析中采用了改进的局域密度近似，其中包括一个范围参数来考虑核子-核子相互作用的有限范围修正。作为例子，计算了入射能量为100 keV < E < 250 MeV时n，p +27 Al的总散射截面、微分弹性散射截面和分析本领。从这种微观的方法的OMP的结果进行比较的实验数据，以及获得的结果与现象学的OMP。一个很好的协议之间的理论结果和测量可以实现所有的入射能量使用一个恒定值的范围参数。
The relativistic optical model potential (OMP) for nucleon-nucleus scattering is investigated in the framework of Dirac-Brueckner-Hartree-Fock (DBHF) approach using the Bonn-B One-Boson- Exchange potential for the bare nucleon-nucleon interaction. Both real and imaginary parts of isospin-dependent nucleon self-energies in nuclear medium are derived from the DBHF approach based on the projection techniques within the subtracted T -matrix representation. The Dirac potentials as well as the corresponding Schrodinger equivalent potentials are evaluated. An improved local density approximation is employed in this analysis, where a range parameter is included to account for a finite-range correction of the nucleon-nucleon interaction. As an example the total cross sections, differential elastic scattering cross sections, analyzing powers for n, p + 27Al at incident energy 100 keV < E < 250 MeV are calculated. The results derived from this microscopic approach of the OMP are compared to the experimental data, as well as the results obtained with a phenomenological OMP. A good agreement between the theoretical results and the measurements can be achieved for all incident energies using a constant value for the range parameter.
DOI：
10.1016/s0168-583x(00)00591-7
发表时间：
2001-04-01
影响因子：
1.3
作者：
Chiari, M;Giuntini, L;Taccetti, N
通讯作者：
Taccetti, N