中能重离子反应中中子-质子有效质量劈裂的研究  

Neutron-Proton Effective Mass Splitting in Intermediate-Energy Heavy Ion Reaction

作　　者：林琳[1] 郭文军[1] 黄璐[1] LIN Lin;GUO Wenjun;HUANG Lu(College of Science,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学理学院,上海200093

出　　处：《上海理工大学学报》2017年第6期532-538,共7页Journal of University of Shanghai For Science and Technology

摘　　要：利用同位旋相关的量子分子动力学模型,研究了^(112)Sn+^(112)Sn,^(124)Sn+^(124)Sn和^(132)Sn+^(132)Sn在能量为50,100,200MeV/u的反应系统中,不同中子-质子有效质量劈裂对原子核阻止和中子、质子发射数的影响.结果表明:中子-质子有效质量劈裂对原子核阻止和中子、质子发射数有很明显影响,且原子核阻止和中子、质子发射数随着有效质量劈裂的增加而递减.可以通过实验测定的原子核阻止和中子、质子发射数来确定中子-质子有效质量劈裂的值.Based on the isospin dependent quantum molecular dynamics model,the effects of different neutron proton effective mass splitting,on the nuclear stopping and neutron proton emission numbers were studied respectively in the reaction systems of112Sn+112Sn,124Sn+124Sn and132Sn+132Sn with different system energy(50,100and200MeV/u).The results show that the neutron proton effective mass splitting has obvious influence on the nuclear stopping and neutron proton emission numbers.When the neutron proton effective mass splitting is increasing,the nuclear stopping and neutron proton emission numbers are decreasing.The value of neutron proton effective mass splitting can be confirmed by the nuclear stopping and neutron proton emission numbers in experiments.

关 键 词：同位旋效应 中能重离子反应 中子-质子有效质量劈裂 

分 类 号：O571.6[理学—粒子物理与原子核物理]