Formation of superheavy nuclei in cold fusion reactions

被引：132

作者：

Feng, Zhao-Qing ^{[1
,2
]}

Jin, Gen-Ming ^{[1
]}

Li, Jun-Qing ^{[1
]}

Scheid, Werner ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany

[3] Inst Theoret Phys Univ, D-35392 Giessen, Germany

来源：

PHYSICAL REVIEW C | 2007年 / 76卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.76.044606

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：

Within the concept of the dinuclear system (DNS), a dynamical model is proposed for describing the formation of superheavy nuclei in complete fusion reactions by incorporating the coupling of the relative motion to the nucleon transfer process. The capture of two heavy colliding nuclei, the formation of the compound nucleus, and the de-excitation process are calculated by using an empirical coupled channel model, solving a master equation numerically and applying statistical theory, respectively. Evaporation residue excitation functions in cold fusion reactions are investigated systematically and compared with available experimental data. Maximal production cross sections of superheavy nuclei in cold fusion reactions with stable neutron-rich projectiles are obtained. Isotopic trends in the production of the superheavy elements Z=110, 112, 114, 116, 118, and 120 are analyzed systematically. Optimal combinations and the corresponding excitation energies are proposed.

引用

页数：9

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