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Self-consistent microscopic description of neutron scattering by $^{16}$O based on the continuum particle-vibration coupling method

机译:中子散射的自洽微观描述   $ ^ {16} $ O基于连续粒子 - 振动耦合方法

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摘要

The microscopic description of neutron scattering by $^{16}$O below 30 MeV iscarried out by means of the continuum particle-vibration coupling (cPVC) methodwith the Skyrme nucleon-nucleon ($NN$) effective interaction. In the cPVCmethod, a proper boundary condition on a nucleon in continuum states isimposed, which enables one to evaluate the transition matrix in astraightforward manner. Experimental data of the total and total-elastic crosssections are reproduced quite well by the cPVC method. An important feature ofthe result is the fragmentation of the single-particle resonance into manypeaks as well as the shift of its centroid energy. Thus, some part of the finestructure of the experimental cross sections at lower energies is welldescribed by the cPVC framework. The cPVC method based on a real $NN$ effectiveinteraction is found to successfully explain about 85% of the reaction crosssection, through explicit channel-coupling effects.
机译:低于30 MeV的$ ^ {16} $ O对中子散射的微观描述是通过连续粒子振动耦合(cPVC)方法与Skyrme核子-核子($ NN $)的有效相互作用进行的。在cPVC方法中,在连续状态下的核子上施加了适当的边界条件,这使人们能够以直截了当的方式评估过渡矩阵。通过cPVC方法可以很好地再现总横截面和总弹性横截面的实验数据。该结果的重要特征是单粒子共振分裂为多个峰值以及质心能量的移动。因此,cPVC框架很好地描述了较低能量下的实验截面的精细结构的某些部分。发现基于真实的$ NN $有效相互作用的cPVC方法通过显式的通道耦合效应成功地解释了约85%的反应截面。

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  • 年度 2012
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