Systematic study of survival probability of excited superheavy nuclei

被引：39
作者：
Xia ChengJun [2 ]
Sun BaoXi [2 ]
Zhao EnGuang [1 ,3 ]
Zhou ShanGui [1 ,3 ]
机构：
[1] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
[2] Beijing Univ Technol, Coll Appl Sci, Beijing 100124, Peoples R China
[3] Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China
来源：
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2011年 / 54卷
基金：
中国国家自然科学基金;
关键词：
survival probability; superheavy elements; island of stability; neutron emission; fission; GROUND-STATE MASSES; HEAVY; FUSION; PREDICTIONS; ENERGY;
D O I：
10.1007/s11433-011-4438-2
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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.
引用
收藏
页码：S109 / S113
页数：5
相关论文
共 36 条
[1]   Analysis of survival probability of superheavy nuclei [J].
Adamian, GG ;
Antonenko, NV ;
Ivanova, SP ;
Scheid, W .
PHYSICAL REVIEW C, 2000, 62 (06) :6
[2]   The mechanism of nuclear fission [J].
Bohr, N ;
Wheeler, JA .
PHYSICAL REVIEW, 1939, 56 (05) :426-450
[3]   EMPIRICAL SADDLE-POINT AND GROUND-STATE MASSES AS A PROBE OF THE DROPLET MODEL [J].
DAHLINGER, M ;
VERMEULEN, D ;
SCHMIDT, KH .
NUCLEAR PHYSICS A, 1982, 376 (01) :94-130
[4]  
Du SS, 2009, SCI CHINA SER G, V52, P1489, DOI [10.1007/s11433-009-0211-1, 10.1007/S11433-009-0211-1]
[5]   Formation of superheavy nuclei in cold fusion reactions [J].
Feng, Zhao-Qing ;
Jin, Gen-Ming ;
Li, Jun-Qing ;
Scheid, Werner .
PHYSICAL REVIEW C, 2007, 76 (04)
[6]   Production cross sections of superheavy nuclei based on dinuclear system model [J].
Feng, Zhao-Qing ;
Jin, Gen-Ming ;
Fu, Fen ;
Li, Jun-Qing .
NUCLEAR PHYSICS A, 2006, 771 :50-67
[7]   The discovery of the heaviest elements [J].
Hofmann, S ;
Münzenberg, G .
REVIEWS OF MODERN PHYSICS, 2000, 72 (03) :733-767
[8]  
IGNATYUK AV, 1975, SOV J NUCL PHYS+, V21, P612
[9]  
IGNATYUK AV, 1979, SOV J NUCL PHYS+, V29, P450
[10]   Superheavy nuclei in the relativistic mean-field theory [J].
Lalazissis, GA ;
Sharma, MM ;
Ring, P ;
Gambhir, YK .
NUCLEAR PHYSICS A, 1996, 608 (02) :202-226
1234