Study of Isotopic Distribution of the Projectile-like Fragments Produced in the ^(17,18)N + ^(197)Au Reactions at 33 MeV/u  

作　　者：李湘庆 华辉 江栋兴 叶沿林 

机构地区：[1]School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University

出　　处：《Plasma Science and Technology》2012年第6期455-459,共5页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China (Nos. 11035001, 11175003, 10875002, 10775005)

摘　　要：The experimental data of the isotopic distribution for projectile-like fragments are presented for the 17,18N ＋ 197Au reaction at 33 MeV/u. The width of the isotopic distributions for lSN projectile is significantly broader than that for 17N projectile, and the average N/Z ratio of the former shifts to higher neutron number side. As long as the realistic nucleon density distribution is used, the isotopic distribution for fragments is reproduced by the simple abrasion-ablation model calculation, which thus provides an independent way to determine the surface distribution of the nuclear matter density for neutron-rich nuclei.The experimental data of the isotopic distribution for projectile-like fragments are presented for the 17,18N ＋ 197Au reaction at 33 MeV/u. The width of the isotopic distributions for lSN projectile is significantly broader than that for 17N projectile, and the average N/Z ratio of the former shifts to higher neutron number side. As long as the realistic nucleon density distribution is used, the isotopic distribution for fragments is reproduced by the simple abrasion-ablation model calculation, which thus provides an independent way to determine the surface distribution of the nuclear matter density for neutron-rich nuclei.

关 键 词：projectile fragmentation isotopic distribution nucleon density distribution neutron-rich nucleus statistical abrasion-ablation model 

分 类 号：O562.6[理学—原子与分子物理]