Isotope Dependence of Superheavy Nucleus Formation Cross Section
LIU Zu-Hua1,2, BAO Jing-Dong2,3
1China Institute of Atomic Energy, Beijing 102413
2Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
3Department of Physics, Beijing Normal University, Beijing 100875
Isotope Dependence of Superheavy Nucleus Formation Cross Section
LIU Zu-Hua1,2;BAO Jing-Dong2,3
1China Institute of Atomic Energy, Beijing 102413
2Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
3Department of Physics, Beijing Normal University, Beijing 100875
Abstract： The dynamical process in the superheavy nucleus synthesis is studied on the basis of the two-dimensional Smoluchowski equation. Special attention is paid to the isotope dependence of the cross section for the superheavy nucleus formation by means of making a comparison among the reaction systems of 54Fe + 204Pb, 56Fe + 206Pb, and 58Fe + 208Pb. It is found by this comparison that the formation cross section is very sensitive to the conditional saddle-point height and the neutron separation energy of the compound nucleus. Reaction systems with lower height of conditional saddle-point and smaller neutron separation energy are more favourable for the synthesis of the superheavy nucleus.
2006, Vol. 23 
