Systematic study of survival probability of excited superheavy nuclei  

作　　者：XIA ChengJun1, SUN BaoXi1, ZHAO EnGuang2,3 & ZHOU ShanGui2,3 1College of Applied Sciences, Beijing University of Technology, Beijing 100124, China 2Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China 3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第S1期109-113,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 (Grant Nos. 10705014, 10775012,10875157, 10975100 and 10979066);the Major State Basic Research Development Program of China (Grant No. 2007CB815000) ;Knowledge Innovation Project of Chinese Academy of Sciences (Grant Nos. KJCX2-EW-N01 and KJCX2-YW-N32);supported by Super computing Center, CNIC of Chinese Academy of Sciences

摘　　要：The stability of excited superheavy nuclei (SHN) with 100 Z 134 against neutron emission and fission is investigated by using a statistical model. In particular, a systematic study of the survival probability against fission in the 1n-channel of these SHN is made. The present calculations consistently take the neutron separation energies and shell correction energies from the calculated results of the finite range droplet model which predicts an island of stability of SHN around Z = 115 and N = 179. It turns out that this island of stability persists for excited SHN in the sense that the calculated survival probabilities in the 1n-channel of excited SHN at the optimal excitation energy are maximized around Z = 115 and N = 179. This indicates that the survival probability in the 1n-channel is mainly determined by the nuclear shell effects.The stability of excited superheavy nuclei (SHN) with 100 Z 134 against neutron emission and fission is investigated by using a statistical model. In particular, a systematic study of the survival probability against fission in the 1n-channel of these SHN is made. The present calculations consistently take the neutron separation energies and shell correction energies from the calculated results of the finite range droplet model which predicts an island of stability of SHN around Z = 115 and N = 179. It turns out that this island of stability persists for excited SHN in the sense that the calculated survival probabilities in the 1n-channel of excited SHN at the optimal excitation energy are maximized around Z = 115 and N = 179. This indicates that the survival probability in the 1n-channel is mainly determined by the nuclear shell effects.

关 键 词：survival probability SUPERHEAVY elements ISLAND of stability NEUTRON emission FISSION 

分 类 号：O571.6[理学—粒子物理与原子核物理]