Shell stabilization and the survival of heavy compound nuclei

被引：1

作者：

Heinz, A

Schmidt, KH

Junghans, AR

机构：

[1] Yale Univ, AW Wright Nucl Struct Lab, New Haven, CT 06520 USA

[2] Gesell Schwerionenforsch mbH, D-94291 Darmstadt, Germany

[3] Forschungszentrum Rossendorf EV, D-01324 Dresden, Germany

来源：

NUCLEAR PHYSICS A | 2004年 / 746卷

关键词：

D O I：

10.1016/j.nuclphysa.2004.09.124

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Knowledge of the influence of nuclear shell structure on the survival probability of heavy compound nuclei against fission is important for a quantitative understanding of the production rates of spherical super-heavy elements (SHE). Fission probabilities of N = 126 isotones beyond astatine can be used as test cases for the production of spherical super-heavy elements, as those isotones possess a strong shell correction energy and are highly fissile. Here, we report on two new experimental approaches which probe the effect of the closed neutron shell at N = 126 on the competition between fission and particle evaporation using projectile fragmentation and electromagnetic-induced fission of radioactive beams. We conclude that these nuclei lose at least a great part of their stability against fission at low excitation energies and angular momenta-mostly due to the influence of collective contributions in the level density. Implications on the production of spherical SHE will be discussed.

引用

页码：483C / 486C

页数：4

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