~5He Emission in Neutron Induced ^(11)B Reactions  

作　　者：WANG Ji-min, ZHANG Jing-shang 

出　　处：《Annual Report of China Institute of Atomic Energy》2007年第1期121-121,共1页中国原子能科学研究院年报（英文版）

摘　　要：The possibility of 5He cluster emission for neutron induced light nucleus reaction has been affirmed theoretically. As well known, 5He is unstable and separated into a neutron and an alphaThe possibility of ^5He cluster emission for neutron induced light nucleus reaction has been affirmed theoretically. As well known, ^5He is unstable and separated into a neutron and an alpha particle spontaneously. The neutron spectra from ^5He breakup process contribute to the low energy region of the total outgoing neutron double-differential cross sections, and the calculated results could improve the fitting with the double-differential measurements. In addition, the calculated results show the fact that the ^5He cluster is emitted mainly from the pre-equilibrium emission process in n＋^11B reactions. In n＋nB reactions, ^5He cluster emission has been discussed with the updated level scheme and the new optical model parameters. In this paper the reaction channels related to ^5He emission are listed in detail. By using the new reaction model for light nuclei, the double-differential cross sections of total outgoing neutrons for n＋^11B reactions at En=14.2 MeV have been calculated, which agree fairly well with the double-differential measurements.

关 键 词：中子发射 原子核物理学 原子核反应 反应横截面 氦 

分 类 号：O571[理学—粒子物理与原子核物理]