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arXiv 0706.0958nucl-thnucl-ex
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对称核的模拟及泡利势在binding energies和半径中的作用

Simulation of symmetric nuclei and the role of Pauli potential in binding energies and radii

M. Angeles Perez-Garcia, K. Tsushima, A. Valcarce

摘要:

结果表明,密度相关的有效泡利势与核子-核子相互作用势的结合,不仅对再现中等质量范围自旋-同位旋饱和核的结合能,而且对再现物质均方根半径都起着至关重要的作用.本研究是在简化的核子-核子相互作用的背景下进行的半经典Monte Carlo多体模拟,专注于由于核子的费米子性质的真实关联的效果。所得到的过程是相当稳健的,它不依赖于核子-核子相互作用的详细特征。对于低于饱和的核,密度依赖性可以用核子数$A$或相关的费米动量来表示。当测试的模拟程序为理想化的“无限”对称核物质在相应的密度范围内,它原来是有限的尺寸效应影响泡利潜在的强度参数化系统高达约120个粒子,而保持近似稳定的较大的系统。

英文摘要:

It is shown that the use of a density dependent effective Pauli potential together with a nucleon-nucleon interaction potential plays a crucial role to reproduce not only the binding energies but also the matter root mean square radii of medium mass range spin-isospin saturated nuclei. This study is performed with a semiclassical Monte Carlo many-body simulation within the context of a simplified nucleon-nucleon interaction to focus on the effect of the genuine correlations due to the fermionic nature of nucleons. The procedure obtained is rather robust and it does not depend on the detailed features of the nucleon-nucleon interaction. For nuclei below saturation the density dependence may be represented in terms either of the nucleon number, $A$, or the associated Fermi momenta. When testing the simulation procedure for idealized "infinite" symmetric nuclear matter within the corresponding range of densities, it turns out that finite size effects affect the Pauli potential strength parametrization in systems up to about 120 particles while remaining approximately stable for larger systems.

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