Production of exotic neutron-deficient isotopes near N, Z=50 in multinucleon transfer reactions  

作　　者：Xin-Xin Xu Gen Zhang Jing-Jing Li Bing Li Cheikh A.T.Sokhna1 Xin-Rui Zhang Xiu-Xiu Yang Shi-Hui Cheng Yu-Hai Zhang Zhi-Shuai Ge Cheng Li Zhong Liu Feng-Shou Zhang 许馨心;张根;李静静;李冰;CheikhA.T.Sokhna;张欣蕊;杨秀秀;程诗慧;张钰海;葛志帅;李成;刘忠;张丰收(Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;Beijing Radiation Center, Beijing 100875, China;Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou 730000, China;Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China)

机构地区：[1]Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China [2]Beijing Radiation Center, Beijing 100875, China [3]Institute of Modem Physics, Chinese Academy of Sciences, Lanzhou 730000, China [4]Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China

出　　处：《Chinese Physics C》2019年第6期51-58,共8页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11635003,11025524,11161130520);the National Basic Research Program of China(2010CB832903);the European Commissions 7th Framework Programme(FP7-PEOPLE-2010-IRSES)(269131)

摘　　要：The multinucleon transfer reaction in the collisions of 40 Ca+^124 Sn at Ec.m.= 128.5 MeV is investigated using the improved quantum molecular dynamics model. The measured angular distributions and isotopic distributions of the products are reproduced reasonably well by the calculations. The multinucleon transfer reactions of 40 Ca+^112 Sn, 58 Ni+^112 Sn, 106 Cd+^112 Sn, and 48 Ca+^112 Sn are also studied. This demonstrates that the combinations of neutron-deficient projectile and target are advantageous for the production of exotic neutron-deficient nuclei near N,Z =50. The charged particles’ emission plays an important role at small impact parameters in the de-excitation processes of the system. The production cross sections of the exotic neutron-deficient nuclei in multinucleon transfer reactions are much larger than those measured in the fragmentation and fusion-evaporation reactions. Several new neutron-deficient nuclei can be produced in the 106 Cd+^112 Sn reaction. The corresponding production cross sections for the new neutron-deficient nuclei,101,112 Sb,103 Te,and 106,107) I,are 2.0 nb,4.1 nb,6.5 nb,0.4 μb and 1.0 μb,respectively.The multinucleon transfer reaction in the collisions of 40 Ca+ 124 Sn at Ec.m. = 128.5 MeV is investigated using the improved quantum molecular dynamics model. The measured angular distributions and isotopic distributions of the products are reproduced reasonably well by the calculations. The multinucleon transfer reactions of 40 Ca +112 Sn, 58 Ni + 112 Sn, 106 Cd + 112 Sn, and 48 Ca + 112 Sn are also studied. This demonstrates that the combinations of neutron-deficient projectile and target are advantageous for the production of exotic neutron-deficient nuclei near N,Z =50. The charged particles’ emission plays an important role at small impact parameters in the de-excitation processes of the system. The production cross sections of the exotic neutron-deficient nuclei in multinucleon transfer reactions are much larger than those measured in the fragmentation and fusion-evaporation reactions. Several new neutron-deficient nuclei can be produced in the 106 Cd + 112 Sn reaction. The corresponding production cross sections for the new neutron-deficient nuclei,101,112 Sb,103 Te,and 106,107) I,are 2.0 nb,4.1 nb,6.5 nb,0.4 μb and 1.0 μb,respectively.

关 键 词：PRODUCTION CROSS-SECTIONS EXOTIC neutron-deficient NUCLEI PRODUCTION cross SECTIONS 

分 类 号：O4[理学—物理]