500A Mev ^(56)Fe-Em作用中的射弹a碎片研究  

Investigation of He Projectile Fragments from 500A GeV ^(56)Fe+Em

作　　者：白彩艳[1,2] 梁云阶[1] 李明星[2] 

机构地区：[1]晋中学院物理与电子工程学院,山西晋中030600 [2]山西师范大学现代物理研究所,山西临汾041004

出　　处：《晋中学院学报》2011年第3期4-6,共3页Journal of Jinzhong University

基　　金：山西省自然科学基金项目"中高能原子核多重碎裂研究"(2008011005)

摘　　要：通过对500 A MeV 56Fe诱发乳胶核反应产生的射弹a碎片的出射几率及角分布进行研究,结果表明56Fe与三种靶作用产生射弹a碎片的几率整体上都是随着射弹a碎片多重数的增加而减小,即,在边缘碰撞中,铁核不论与轻靶还是重靶作用,主要产生低多重数的射弹a碎片;a粒子的投影角分布可以用单一的高斯分布进行描述;而a粒子的发射角分布要用两个不同宽度的高斯分布的叠加进行拟合.The emergence probability and the angular distribution of He Projectile Fragments produced by the nuclear emulsion interaction induced by 500 A MeV 56Fe were studied in this paper.The results indicated that the probability of He Projectile Fragments from the interactions of the 500A GeV 56Fe and three kinds of targets decreased with the increase of the multiplicity.In peripheral collision Fe nucleus produced the He Projectile Fragments of the multiplicity whether the nuclear emulsion was heavy nucleus or not.The projective angular distribution of He particle was described in the single Gaussian distribution.The distribution of emission angle of He particle was fitted in the superposition of two different width Gaussian distributions.

关 键 词：相对论性重离子碰撞 射弹a碎片 核乳胶 

分 类 号：O571[理学—粒子物理与原子核物理]