Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data
LIU Zu-Hua1,2, ZHOU Hong-Yu1
1Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2China Institute of Atomic Energy, Beijing 102413
Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data
LIU Zu-Hua1,2;ZHOU Hong-Yu1
1Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2China Institute of Atomic Energy, Beijing 102413
Abstract： The reactions of 16O+204Pb, 82Se+138Ba and 96Zr+124Sn lead to the same compound nucleus 220Th. In terms of the assumption that the surviving probability is independent of entrance channel, we have extracted the fusion hindrance factor from the evaporation residue cross sections for the reactions of 82Se+138Ba and 96Zr+124Sn and compared with the results calculated using a two-parameter Smoluchowski equation. The theoretical predictions are basically in agreement with the experimental data. It is found that the probability of forming a compact 220Th is less than 10% for the reactions considered. For the systems more massive than 220Th, fusion should be much more strongly suppressed due to the competition of quasifission with complete fusion. Understanding of this inhibition is essential to forming new superheavy nuclei.
LIU Zu-Hua;ZHOU Hong-Yu. Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data[J]. 中国物理快报, 2006, 23(9): 2395-2398.
LIU Zu-Hua, ZHOU Hong-Yu. Fusion Hindrance Factor of Heavy Nuclei Extracted from Experimental Data. Chin. Phys. Lett., 2006, 23(9): 2395-2398.
2006, Vol. 23 
