Improvement on Fermionic properties and new isotope production in molecular dynamics simulations
Improvement on Fermionic properties and new isotope production in molecular dynamics simulations
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分子动力学模拟中费米子性质的改进和新同位素的产生
DOI：
10.1088/0954-3899/43/6/065101
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发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
Li Ou
中科院分区：
文献类型：
--
作者：
Ning Wang;Tong Wu;Jie Zeng;Yongxu Yang;Li Ou
通过在费米约束过程中考虑动量转移，在量子分子动力学模拟中可以进一步提高重离子碰撞中产生的初始核和碎片的稳定性。该方法有效地减少了相空间占用概率大于1的情况。同时，对于单个核反应和重离子反应，能量守恒都能得到更好的描述。利用改进的量子分子动力学(ImQMD)模型，重新计算了35ameV下Au+Au的熔合激发函数和Au+Au的中心碰撞.由于杂散核子发射的减少，亚势垒能下的聚变截面和碎片的电荷分布得到了较好的再现。并预测了Xe+Sn、U+U和Zr+Sn中能碎片的电荷和同位素分布。在U+U的中心碰撞中观察到的未测得的Z=16-28$的极富中子碎片比锆锡的中心碎片多，这表明U+U的多重碎裂可能为获得新的富中子同位素提供了一条有效的途径。
By considering momentum transfer in the Fermi constraint procedure, the stability of the initial nuclei and fragments produced in heavy-ion collisions can be further improved in the quantum molecular dynamics simulations. The case of the phase space occupation probability larger than one is effectively reduced with the proposed procedure. Simultaneously, the energy conservation can be better described for both individual nuclei and heavy-ion reactions. With the revised version of the improved quantum molecular dynamics (ImQMD) model, the fusion excitation functions of $^{16}$O+$^{186}$W and the central collisions of Au+Au at 35 AMeV are re-examined. The fusion cross sections at sub-barrier energies and the charge distribution of fragments are relatively better reproduced due to the reduction of spurious nucleon emission. The charge and isotope distribution of fragments in Xe+Sn, U+U and Zr+Sn at intermediate energies are also predicted. More unmeasured extremely neutron-rich fragments with $Z=16-28$ are observed in the central collisions of $^{238}$U+$^{238}$U than that of $^{96}$Zr+$^{124}$Sn, which indicates that multi-fragmentation of U+U may offer a fruitful pathway to new neutron-rich isotopes.
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影响因子：
3.1
作者：
Y. Zhang;Zhu-xia Li
通讯作者：
Y. Zhang;Zhu-xia Li
影响因子：
3.1
作者：
Feng-Shou Zhang;Lie-Wen Chen;Zhao-Yu Ming;Zhi-yuan Zhu
通讯作者：
Feng-Shou Zhang;Lie-Wen Chen;Zhao-Yu Ming;Zhi-yuan Zhu
DOI：
10.1103/physrevc.50.2017
发表时间：
1994-10
期刊：
Physical review. C, Nuclear physics
影响因子：
--
作者：
Hagel;Gonin;Wada;Natowitz;Haddad;Lou;Gui;Utley;Xiao;Li;Nebbia;Fabris;Prete;Ruiz;Drain;Chambon;Cheynis;Guinet;Hu;Demeyer;Pastor;Giorni;Llères;Stassi;Viano;Gonthier
通讯作者：
Hagel;Gonin;Wada;Natowitz;Haddad;Lou;Gui;Utley;Xiao;Li;Nebbia;Fabris;Prete;Ruiz;Drain;Chambon;Cheynis;Guinet;Hu;Demeyer;Pastor;Giorni;Llères;Stassi;Viano;Gonthier
影响因子：
4.4
作者：
G. Souliotis;M. Veselský;G. Chubarian;L. Trache;A. Keksis;E. Martin;A. Ruangma;E. Winchester;S. Yennello
通讯作者：
G. Souliotis;M. Veselský;G. Chubarian;L. Trache;A. Keksis;E. Martin;A. Ruangma;E. Winchester;S. Yennello
DOI：
10.1016/0370-1573(91)90094-3
发表时间：
1991-04
期刊：
Physics Reports
影响因子：
--
作者：
J. Aichelin
通讯作者：
J. Aichelin