Two-body dissipation effects on the synthesis of superheavy elements
Two-body dissipation effects on the synthesis of superheavy elements
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DOI：
10.1103/physrevc.93.034607
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发表时间：
2015-12
影响因子：
3.1
通讯作者：
M. Tohyama;Ahmad Umar
中科院分区：
文献类型：
--
作者：
M. Tohyama;Ahmad Umar
为了研究两体耗散对超重元素合成的影响，我们利用时间依赖密度矩阵理论（TDDM）计算了$N=50$同色子（$^{82}$Ge, $^{84}$Se, $^{86}$Kr和$^{88}$Sr）在$^{208}$Pb上的低能碰撞。TDDM是对时变Hartree-Fock （TDHF）理论的扩展，可以确定单体和双体密度矩阵的时间演化。因此，TDDM既描述了集体能量的单体耗散，也描述了双体耗散。结果表明，两体耗散增大了熔合截面，促进了超重元素的合成。
To investigate the two-body dissipation effects on the synthesis of superheavy elements, we calculate low-energy collisions of the $N=50$ isotones ($^{82}$Ge, $^{84}$Se, $^{86}$Kr and $^{88}$Sr) on $^{208}$Pb using the time-dependent density-matrix theory (TDDM). TDDM is an extension of the time-dependent Hartree-Fock (TDHF) theory and can determine the time evolution of one-body and two-body density matrices. Thus TDDM describes both one-body and two-body dissipation of collective energies. It is shown that the two-body dissipation may increase fusion cross sections and enhance the synthesis of superheavy elements.