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arXiv 1509.09155nucl-thnucl-ex
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小振幅和大振幅微观平均场动力学中的集体性

Collectivity in small and large amplitude microscopic mean-field dynamic

Denis Lacroix, Yusuke Tanimura, Guillaume Scamps

摘要:

与时间相关的能量密度函数与配对允许描述各种各样的现象,从小到大振幅集体运动。在这里,我们简要地总结了该领域的最新进展,使用TD-BCS方法。重点研究了集体空间中微观平均场动力学到宏观动力学的映射。提出了一种从TD-EDF中提取集体质量参数的方法。对$^{258}$ Fm的裂变作了图解。在TD-EDF路径上估计了包含非绝热效应的四极形变的集体质量和集体动量,并讨论了裂变过程中耗散的开始.

英文摘要:

The time-dependent energy density functional with pairing allows to describe a large variety of phenomena from small to large amplitude collective motion. Here, we briefly summarize the recent progresses made in the field using the TD-BCS approach. A focus is made on the mapping of the microscopic mean-field dynamic to the macroscopic dynamic in collective space. A method is developed to extract the collective mass parameter from TD-EDF. Illustration is made on the fission of $^{258}$Fm. The collective mass and collective momentum associated to quadrupole deformation including non-adiabatic effects is estimated along the TD-EDF path. With these information, the onset of dissipation during fission is discussed.

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