【摘 要】
:
用推广的裂变扩散模型研究了裂变前壳效应对粒子发射的影响 .双幻核2 0 8Pb和13 2 Sn被用作例子来展示这个壳效应 .计算结果表明壳效应对这两个复合系统断前发射的粒子有影响
论文部分内容阅读
用推广的裂变扩散模型研究了裂变前壳效应对粒子发射的影响 .双幻核2 0 8Pb和13 2 Sn被用作例子来展示这个壳效应 .计算结果表明壳效应对这两个复合系统断前发射的粒子有影响 .对中子 ,壳的影响非常明显 .我们发现壳对中子发射的影响随着裂变系统激发能的增加而逐渐变弱
The effect of the pre-fission shell effect on particle emission was studied using a generalized fission-diffusion model. Two phantom nuclei, 208Pb and 13 2 Sn, were used as an example to demonstrate the shell effect. The calculated results show that the shell effect on these two complex systems The particles emitted before are influential, and the effect on neutron and shell is obvious. We find that the influence of shell on neutron emission gradually weakens with the increase of excitation energy of fission system
其他文献
利用相干渡越辐射(CTR)测量短和超短电子束团长度是国际上束测领域新发展的频域测量技术.文中理论分析和数值计算了北京自由电子激光装置的皮秒级的射频电子束团序列产生的CT
Nanogold particles in different sizes, from 5 to 60 nm, were utilized to modify the surface of the quartz crystal microbalance (QCM). It was found that the gold
用标准放射源进行模拟核材料库房监控实验,当放射源被转移出系统的时候,在不同位置探测了γ计数率变化,根据γ计数率变化的距离平方反比规律实现了被转移的放射源的定位,并估
Reaction of (ArO)2Sm(THF)4 (ArO = 2,6-di- tert-butyl-4-methylphenolate) with Et2AlCl in THF gives SmCl2 (1) and (ArO)AlEt2(THF) (2) via ligand exchange. Complex
小组合作学习是新课程倡导的学习方式之一.然而,由于教师认识上的偏颇,以及操作层面上对学生缺少有效的指导,并不是所有的合作学习都能达到预期的效果.许多数学课堂上的合作
本文运用学习策略的理论,通过实证调查分析,研究了高职高专非英语专业学生语音学习状况、常用的语音学习策略,以及语音水平不同的学生在使用策略上的差异性,从而分析造成这些
A water-soluble oligo(p-phenylkene vinylene) [4,4′-(1,4-phenylene dithenylene)-bis-(N-methyl pyridinium iodide)] was synthesized by Witting reaction. The oligo
本文针对语文课堂有效教学的问题,着重从“活”、“实”、“美”三个方面进行了思考。
This essay focuses on the effective teaching of Chinese classrooms, focusing on
文章介绍中意合作DAMA组100kg NaI(T1)晶体阵列实验结果,重点探讨了可能影响探测实验结果的多种因素.通过蒙特卡罗模拟计算,北京组得到了探测晶体阵列内部的放射性杂质的本底
The common practice for determination of orientational angle of interfacial molecular groups with the interfacial sum frequency generation vibrational spectrosc