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arXiv 0706.2693nucl-th
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基于微观方法的质子与稳定和不稳定核散射的反应截面

Reaction cross sections for proton scattering from stable and unstable nuclei based on a microscopic approach

H. F. Arellano, M. Girod

摘要:

给出了质子弹性散射反应截面的微观光学模型势结果。这些应用涵盖了10-1000 MeV的能量范围,并考虑了稳定和不稳定的核。研究基于介质中g矩阵全折叠光学模型方法,并对高能应用进行了适当的相对论运动学修正。有效的相互作用是基于现实的NN潜力补充一个可分离的非厄米项,以允许最佳协议与当前NN相移分析,特别是π生产阈值以上的非弹性。目标基态密度由Hartree-Fock-Bogoliubov计算得到,基于有限范围,密度相关的Gogny力。质子散射的反应截面的评估进行了比较与测量和它们的系统性进行了分析。在高能量下观察到总截面与原子质量数的简单函数关系。然而,在低能量下,观察到与现有数据的差异,在较轻的系统中更为明显。

英文摘要:

Microscopic optical model potential results for reaction cross sections of proton elastic scattering are presented. The applications cover the 10-1000 MeV energy range and consider both stable and unstable nuclei. The study is based on in-medium g-matrix full-folding optical model approach with the appropriate relativistic kinematic corrections needed for the higher energy applications. The effective interactions are based on realistic NN potentials supplemented with a separable non-Hermitian term to allow optimum agreement with current NN phase-shift analyzes, particularly the inelasticities above pion production threshold. The target ground-state densities are obtained from Hartree-Fock-Bogoliubov calculations based on the finite range, density dependent Gogny force. The evaluated reaction cross sections for proton scattering are compared with measurements and their systematics is analyzed. A simple function of the total cross sections in terms of the atomic mass number is observed at high energies. At low energies, however, discrepancies with the available data are observed, being more pronounced in the lighter systems.

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