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arXiv 1812.11751nucl-thnucl-ex
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有限温度相对论框架中的核响应

Nuclear response in a finite-temperature relativistic framework

Elena Litvinova, Herlik Wibowo

摘要:

相对论性核场论的热扩展被制定为核响应。的Bethe-Salpeter方程(BSE)与时间相关的内核的粒子-空穴响应内的松原格林函数形式主义的治疗。我们表明,与温度相关的投影算子的子空间上的虚时间(时间阻塞)的帮助下,它是可能的减少BSE的核响应函数到一个单一的频率变量方程也在有限的温度。该方法是在基于介子-核子拉格朗日量的量子强子动力学框架下自洽实现的。该方法适用于$^{48}$钙的双极,偶极和四极响应和锡同位素$^{100,120,132}$ Sn的偶极响应,特别是,核集体振荡随温度的演变的研究。这篇文章是专门为纪念码头弗朗切斯科Bortignon和致力于有关他的开拓性思想的发展。

英文摘要:

A thermal extension of the relativistic nuclear field theory is formulated for the nuclear response. The Bethe-Salpeter equation (BSE) with the time-dependent kernel for the particle-hole response is treated within the Matsubara Green's function formalism. We show that, with the help of a temperature-dependent projection operator on the subspace of the imaginary time (time blocking), it is possible to reduce the BSE for the nuclear response function to a single frequency variable equation also at finite temperature. The approach is implemented self-consistently in the framework of quantum hadrodynamics based on the meson-nucleon Lagrangian. The method is applied to the monopole, dipole and quadrupole response of $^{48}$Ca and to the dipole response of the tin isotopes $^{100,120,132}$Sn, in particular, to a study of the evolution of nuclear collective oscillations with temperature. The article is dedicated to the memory of Pier Francesco Bortignon and devoted to the developments related to his pioneering ideas.

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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