Formation of Superheavy Nuclei in Massive Fusion Reactions
Within the concept of the dinuclear system(DNS),by incorporating the coupling of the relative motion to the nucleon transfer process,a dynamical model is proposed for describing the formation of superheavy residue nucleus in massive fusion reactions,in which the capture of two heavy colliding nuclei,the formation of compound nucleus and the de-excitation process are calculated using empirical coupled channel model,solving master equation numerically and statistical theory,respectively.By using the DNS model,the evaporation-residue excitation functions in the 48Ca induced fusion reactions and in the cold fusion reactions are investigated systematically and compared with available experimental data.Optimal evaporation channels and combinations as well as the corresponding excitation energies are proposed.The possible factors that influencing the isotopic dependence of the production cross sections are analyzed.The formation of the superheavy nuclei based on the isotopes U with different projectiles are also investigated.
DNS model massive fusion reaction evaporation-residue ezcitation function
FENG Zhao-qing JIN Gen-ming LI Jun-qing Scheid Werner
Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China Institut für Theoretische Physik der Universit(a)t,35392 Giessen,Germany
国际会议
3rd China-Japan-Korea Hadron and Nuclear Physics 2008 Symposium(第三届中日韩强子物理与核物理研讨会)
兰州
英文
168-174
2008-06-23（万方平台首次上网日期，不代表论文的发表时间）