Formation of superheavy nuclei in cold fusion reactions

Zhao-Qing Feng, Gen-Ming Jin, Jun-Qing Li, and Werner Scheid
Phys. Rev. C 76, 044606 – Published 16 October 2007

Abstract

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.

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  • Received 19 July 2007

DOI:https://doi.org/10.1103/PhysRevC.76.044606

©2007 American Physical Society

Authors & Affiliations

Zhao-Qing Feng1,2, Gen-Ming Jin1, Jun-Qing Li1, and Werner Scheid3

  • 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China
  • 2Gesellschaft für Schwerionenforschung mbH (GSI), D-64291 Darmstadt, Germany
  • 3Institut für Theoretische Physik der Universität, D-35392 Giessen, Germany

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Issue

Vol. 76, Iss. 4 — October 2007

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