Superfluid dynamics of Fm 258 fission
Superfluid dynamics of Fm 258 fission
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DOI：
10.1103/physrevc.92.011602
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发表时间：
2015-07
影响因子：
3.1
通讯作者：
G. Scamps;C. Simenel;D. Lacroix
中科院分区：
文献类型：
--
作者：
G. Scamps;C. Simenel;D. Lacroix
核裂变的理论描述仍然是量子多体动力学的主要挑战之一。在穿过裂变势垒的运动之后，碎片之间的电势会快速地、非绝热地下降。后一阶段是至关重要的，因为它在碎片中产生大部分激发能。在含时Hartree-Fock理论下，考虑BCS动力学配对关联，得到了裂变后期的超流动力学。研究了核的裂变方式。由此产生的裂变碎片的特性显示出良好的协议与实验数据。量子壳效应被证明在碎片的动力学和形成中起着至关重要的作用。量子涨落的重要性超出了独立的粒子和准粒子图片强调和定性研究。
The theoretical description of nuclear fission remains one of the major challenges of quantum many-body dynamics. The motion through the fission barrier is followed by a fast, nonadiabatic descent of the potential between the fragments. The latter stage is crucial as it generates most of the excitation energy in the fragments. The superfluid dynamics in the latter stage of fission is obtained from the time-dependent Hartree-Fock theory including BCS dynamical pairing correlations. The fission modes of thenucleus are studied. The resulting fission fragment characteristics show good agreement with experimental data. Quantum shell effects are shown to play a crucial role in the dynamics and formation of the fragments. The importance of quantum fluctuations beyond the independent particle and quasiparticle picture is emphasized and qualitatively studied.