Shell effect and capture cross sections in the synthesis of superheavy nuclei  

作　　者：DU SaiSai1,2,BIAN BaoAn1,2,3,LIU Min1,2,4,FENG ZhaoQing5,6 & ZHANG FengShou1,2,6 1 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 School of Science,Jiangnan University,Wuxi 214122,China 4 College of Physics and Technology,Guangxi Normal University,Guilin 541004,China 5 Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China 6 Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator of Lanzhou,Lanzhou 730000,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第10期1489-1493,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grants Nos.10575012 and 10435020);the Doctoral Station Foundation of Ministry of Education of China (Grant No.200800270017)

摘　　要：The shell effect is included in the improved isospin dependent quantum molecular dynamics model in which the shell correction energy of the system is calculated by using the deformed two-center shell model. A switch function is introduced to connect the shell correction energy of the projectile and the target with that of the compound nucleus during the dynamical fusion process. It is found that the calculated capture cross sections reproduce the experimental data quantitatively at the energy near the Coulomb barrier. The capture cross sections for reaction 35 80 Br + 82 208 Pb → 117 288 X are also calculated and discussed.The shell effect is included in the improved isospin dependent quantum molecular dynamics model in which the shell correction energy of the system is calculated by using the deformed two-center shell model.A switch function is introduced to connect the shell correction energy of the projectile and the target with that of the compound nucleus during the dynamical fusion process.It is found that the calculated capture cross sections reproduce the experimental data quantitatively at the energy near the Coulomb barrier.The capture cross sections for reaction 8305 Br + 28028 Pb → 121878X are also calculated and discussed.

关 键 词：SUPERHEAVY NUCLEI transport theory SHELL EFFECT cross SECTIONS 

分 类 号：O571.6[理学—粒子物理与原子核物理]