蒙特卡罗输运码中Fission中子模拟子程序
Subroutines to Simulate Fission Neutrons for Monte Carlo Transport Codes
摘要：
编写了Fortran子程序，模拟了~（252）Cf和~（240）Pu自发裂变以及~（239）Pu和~（235）U热中子诱发裂变产生裂变中子的过程。这四个子程序的名称分别是getnv 252、getnv 240、getnv 239和getnv 235。这些子程序再现测量的第一，第二，和第三时刻的中子多重性分布，测量的中子裂变相关数据的自发裂变的252 Cf，和测量的中子-中子相关数据的自发裂变的252 Cf和热中子诱发裂变的235 U。这里提出的代码可以用来研究中子-中子相关性的可能用途在该地区的透明度测量和中子-中子相关性的使用符合中子成像。
英文摘要：
Fortran subroutines have been written to simulate the production of fission neutrons from the spontaneous fission of 252Cf and 240Pu, and from the thermal neutron induced fission of 239Pu and 235U. The names of these four subroutines are getnv252, getnv240, getnv239, and getnv235, respectively. These subroutines reproduce measured first, second, and third moments of the neutron multiplicity distributions, measured neutron-fission correlation data for the spontaneous fission of 252Cf, and measured neutron-neutron correlation data for both the spontaneous fission of 252Cf and the thermal neutron induced fission of 235U. The codes presented here can be used to study the possible uses of neutron-neutron correlations in the area of transparency measurements and the uses of neutron-neutron correlations in coincidence neutron imaging.
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