0.95A至10.7A GeV核-乳胶碰撞中发射靶粒子的角分布特性研究  

Angular Distribution of Target Particles Emitted in 0.95A to 10.7A GeV Nucleus-emulsion Collisions

作　　者：高雁[1] 孙建新[2] 

机构地区：[1]忻州师范学院物理系,山西忻州034000 [2]山西大同大学工学院,山西大同037003

出　　处：《山西大学学报（自然科学版）》2010年第4期551-555,共5页Journal of Shanxi University(Natural Science Edition)

基　　金：山西省自然科学基金(2007011005);忻州师范学院院级基金(200804)

摘　　要：考虑到发射源在横向和纵向的运动问题,用多源理想气体模型研究了高能核-乳胶碰撞中发射的靶粒子的角分布特性.计算得到的平均趋势与2.1AGeV He-和O-Em中心碰撞及1.8AGeV Ar-Em中心碰撞中产生的慢质子,4.1AGeV Ne-Em各类中心性碰撞中产生的b-粒子(黑粒子),0.95AGeV Kr-Em各类中心性碰撞中产生的b-和g-粒子(灰粒子),以及10.7AGeV Au-Em各类中心性碰撞中产生的b-和g-粒子的实验数据符合.Angular distributions of target particles emitted in nucleus-emulsion collisions at high energies are studied by using a multisource ideal gas model. The emission source is considered to have movements in transverse and longitudinal directions. The calculated mean trends are compared and found to be in agree- ment with the experimental data of slow protons produced in central He- and O-Era collisions at 2.1A GeV and central Ar-Em collisions at 1.8A GeV, b-particles （black particles） produced in different eentralities for Ne-Em collisions at 4.1A GeV,b- and g particles （grey particles） produced in different centralities for Kr-Em collisions at 0.95A GeV, and b and g particles produced in different centralities for Au-Em collisions at 10.7A GeV.

关 键 词：角分布 靶粒子 核-乳胶碰撞 

分 类 号：O572.25[理学—粒子物理与原子核物理]