Production of heavy neutron-rich nuclei with radioactive beams in multinucleon transfer reactions  

作　　者：Cheng Li Peiwei Wen Jingjing Li Gen Zhang Bing Li Feng-Shou Zhang 

机构地区：[1]The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China [2]Beijing Radiation Center, Beijing 100875, China [3]Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000,China

出　　处：《Nuclear Science and Techniques》2017年第8期97-102,共6页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China under Grants Nos.11635003,11025524 and 11161130520;the National Basic Research Program of China under Grant No.2010CB832903;the European Commission’s 7th Framework Programme(Fp7-PEOPLE-2010-IRSES)under Grant Agreement Project No.269131;the Project funded by China Postdoctoral Science Foundation(Grant No.2016M600956)

摘　　要：The production mechanism of heavy neutronrich nuclei is investigated by using the multinucleon transfer reactions of ^(136;148)Xe+^(208)Pb and ^(238)U+^(208)Pb in the framework of a dinuclear system model. The evaporation residual cross sections of target-like fragments are studied with the reaction system ^(148)Xe+^(208)Pb at near barrier energies. The results show that the final isotopic production cross sections in the neutron-deficient side are very sensitive to incident energy while it is not sensitive in the neutron-rich side. Comparing the isotopic production cross sections for the reactions of ^(208)Pb bombarded with stable and radioactive projectiles, we find that neutron-rich radioactive beams can significantly increase the production cross sections of heavy neutron-rich nuclei.The production mechanism of heavy neutron- rich nuclei is investigated by using the multinucleon transfer reactions of 136,148Xe＋208pb and 238U＋208pb in the framework of a dinuclear system model. The evaporation residual cross sections of target-like fragments are studied with the reaction system 148Xe＋208pb at near barrier energies. The results show that the final isotopic production cross sections in the neutron-deficient side are very sensi- tive to incident energy while it is not sensitive in the neutron-rich side. Comparing the isotopic production cross sections for the reactions of 208pb bombarded with stable and radioactive projectiles, we find that neutron-rich radioactive beams can significantly increase the production cross sections of heavy neutron-rich nuclei.

关 键 词：多核子转移反应 重丰中子核 生产机制 放射性 蒸发剩余截面 同位素生产 入射能量 模型框架 

分 类 号：O571.5[理学—粒子物理与原子核物理]