Entrance Channel Dependence of Production Cross Sections of Superheavy Nuclei in Cold Fusion Reactions
FENG Zhao-Qing1,2,6, JIN Gen-Ming1,2, FU Fen2,6, ZHANG Feng-Shou1,3,5, JIA Fei2,6, HUANG Xi1,2,6, HU Rong-Jiang2, LI Wen-Fei4, LI Jun-Qing1,2
1Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
3Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875
4Department of Physics, Nanjing University, Nanjing 210093
5CCAST (Word Laboratory), Beijing 100080
Graduate School, Chinese Academy of Sciences, Beijing 100039
Entrance Channel Dependence of Production Cross Sections of Superheavy Nuclei in Cold Fusion Reactions
1Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
3Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875
4Department of Physics, Nanjing University, Nanjing 210093
5CCAST (Word Laboratory), Beijing 100080
Graduate School, Chinese Academy of Sciences, Beijing 100039
Abstract： Production cross sections of superheavy nuclei Rf and Hs for asymmetric and nearly symmetric projectile-target combinations are systematically studied within the framework of the dinuclear system model. The calculated results show that the production cross sections are strongly dependent on the symmetry of reaction systems. The obtained results are in good agreement with the available experimental data for asymmetric reaction systems. For nearly symmetric systems, the model gives opposite results with coupled channel model in which surface vibration and nucleon transfer are included.
2005, Vol. 22 
