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Shape Evolutions in Fission Dynamics Within Time-Dependent Hartree-Fock Approach
Frontiers in Physics ( IF 1.9 ) Pub Date : 2020-07-24 , DOI: 10.3389/fphy.2020.00351
Marko Pancic , Yu Qiang , Junchen Pei , Paul Stevenson

We studied the nuclear shape evolutions in fission process of 240Pu by the time-dependent Hartree-Fock approach with various Skyrme forces. Calculations are performed for the later phase of the fission with large initial deformations toward the scission. We show that calculations with Skyrme forces with large surface energies and large symmetry energies can have extremely long fission evolution time. The symmetry energy plays a role in the evolution of neutron-rich necks. In addition, we also demonstrated the shape oscillations of fission fragments after the fission. We see that particularly the heavy near-spherical fragments have remarkable octupole oscillations.



中文翻译:

时变Hartree-Fock方法中裂变动力学的形状演化

我们通过时变的Hartree-Fock方法和各种Skyrme力研究了240 Pu裂变过程中的核形演化。对裂变的后期进行了计算,该裂变的后期具有朝向裂隙的较大初始变形。我们表明,使用具有大表面能和大对称能的Skyrme力进行的计算可能具有非常长的裂变演化时间。对称能量在富中子颈的演化中起作用。此外,我们还证明了裂变后裂变碎片的形状振荡。我们看到特别重的近球形碎片具有显着的八极振荡。

更新日期:2020-09-11
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