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arXiv 1107.2184nucl-th
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广义密度矩阵的再认识:软球核集体动力学的微观研究

Generalized Density Matrix Revisited: Microscopic Approach to Collective Dynamics in Soft Spherical Nuclei

L. Y. Jia

摘要:

采用广义密度矩阵(GDM)方法,从微观上计算了集体哈密顿量的参数。高阶非谐性得到一致的最低阶的结果,平均场[Hartree-Fock-Bogoliubov(HFB)方程]和谐波势[准粒子无规相位近似(QRPA)]。该方法适用于软球核,其中的非谐性是必不可少的恢复系统的稳定性,作为谐波势变得很小或负。该方法在三个模型的复杂性不断增加:Lipkin模型,模型与可因子化的力量,和四极加配对模型进行测试。

英文摘要:

The generalized density matrix (GDM) method is used to calculate microscopically the parameters of the collective Hamiltonian. Higher order anharmonicities are obtained consistently with the lowest order results, the mean field [Hartree-Fock-Bogoliubov (HFB) equation] and the harmonic potential [quasiparticle random phase approximation (QRPA)]. The method is applied to soft spherical nuclei, where the anharmonicities are essential for restoring the stability of the system, as the harmonic potential becomes small or negative. The approach is tested in three models of increasing complexity: the Lipkin model, model with factorizable forces, and the quadrupole plus pairing model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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