点击次数：
影响因子：3.8
DOI码：10.1103/PhysRevC.103.L031304
发表刊物：PHYSICAL REVIEW C
关键字：fission fragments, brosa model, dynamical pairing
摘要：Energy dependence of fission observables is a key issue for wide nuclear applications. We studied real-time fission dynamics from low-energy to high excitations in the compound nucleus 240Pu with the time-dependent Hartree-Fock + BCS approach. It is shown that the evolution time of the later phase of fission towards scission is considerably lengthened at finite temperature. As the role of dynamical pairing is vanishing at high excitations, the random transition between single-particle levels around the Fermi surface to mimic thermal fluctuations is indispensable to drive fission. The obtained fission yields and total kinetic energies with fluctuations can be divided into two asymmetric scission channels, namely, S1 and S2, which explain well experimental results and give microscopic support to the Brosa model. With increasing fluctuations, the S2 channel takes over the S1 channel and the spreading fission observables are obtained.
合写作者：P. D. Stevenson
第一作者：Yu Qiang
论文类型：期刊论文
通讯作者：JunChen Pei
一级学科：物理学
文献类型：期刊
卷号：103
页面范围：L031304
是否译文：否
发表时间：2021-03-24
收录刊物：SCI