丰质子核反应中轻带电粒子发射的同位旋效应

Isospin Effects on Production Cross Section of Light Charged Particles in Reaction of Proton Rich Nuclei

采用同位旋相关的Boltzmann-Langevin方程计算了核素12—15N和17—20Ne反应中轻带电粒子发射的同位旋效应。12—15N与28Si靶的反应结果显示轻带电粒子的产生截面有明显的同位旋效应,12N的轻带电粒子产生截面突然增大,与实验得出的结论相同,由此检验了所采用的计算方法的可行性。同时还计算了17—20Ne与9Be靶的反应,发现17Ne的轻带电粒子产生截面也是突然增大,并且其质子分布有较大的弥散,据此认为17Ne可能具有晕结构。

Within the Boltzmann-Langevin equation, the isospin effects on the production cross sections of light charged particles （LCP） in the reaction of proton rich nuclei were studied. We have calculated the LCP production cross sections of the reaction ^12-15N ＋ ^28Si at 55 MeV/u and ^17-20Ne ＋ ^9Be at 60 MeV/u. The LCP production cross sections of ^12N increase abnormally in comparison with those of ^13-15N. The result accorded with experimental one. It also happened to ^17-20Ne. It suggests that ^17Ne is probably a proton halo nucleus.