13.9—15.6MeV中子引起的~(65)Cu(n,p)~(65)Ni反应中剩余核反冲平均投影射程的测定

THE DETERMINATION OF ~(65)Ni AVERAGE PROJECTIONAL RECOIL RANGES IN ~(65)Cu(n,p)~(65)Ni REACTION WITH 13.9-15.6 MeV NEUTRONS

摘要: <正> 剩余核反冲平均投影射程(以下简称反冲射程)的研究已成为研究中能核反应的有用工具之一。剩余核反冲射程的测定能反映出在核反应中所发射粒子的角分布和能谱。当出射粒子以各向同性或以90°为对称发射时,剩余核的朝前和朝后反冲射程比必定较大。这时,复合核反应机制起主要作用。当出射粒子朝前发射多于朝后发射时,朝前与朝后反冲射程比下降,即发生直接作用过程。因此,核反应机制可以通过测量剩余核的反冲射程来研

Abstract: In this work, the forward-backward average projectional recoil ranges of the residual 65Ni with respect to the beam direction in the 65Cu(n,p) 65Ni reaction with 13.9-15.6 MeV neutrons were determined by thick target-thick catcher method. The forward recoil fraction of 65Ni is much less than that produced in the 65Cu(p,pπ+) 65Ni reaction. In addition, the forward recoil fraction of 65Ni is much larger than its backward recoil fraction, which shows that the compound Nuclear statistical process plays a main role in the 65Cu(n,p)65Ni reaction with 13.9-15.6 MeV neutrons.