Fusion probabilities in the reactions 40,48Ca+238U at energies around the Coulomb barrier

K. Nishio, S. Mitsuoka, I. Nishinaka, H. Makii, Y. Wakabayashi, H. Ikezoe, K. Hirose, T. Ohtsuki, Y. Aritomo, and S. Hofmann
Phys. Rev. C 86, 034608 – Published 18 September 2012

Abstract

Fission cross sections and fission fragment mass distributions were measured in the reactions of 40Ca+238U and 48Ca+238U at energies around the Coulomb barrier. Fusion probabilities were calculated based on the fluctuation dissipation model. The measured mass distributions for both reactions showed an asymmetric shape at low incident energies, whereas the distribution changed to a flat shape at higher energies. The variation of the mass distribution is explained by a change of the ratio between fusion and quasifission with nuclear orientation. The calculation reproduced the mass distributions and their energy dependence. The trajectories for fusion-fission were used to determine the fusion probability. Fusion probabilities for both reactions are identical as function of the center-of-mass energy (Ec.m.), but they differ when plotted as function of the excitation energy (E*). Evaporation residue cross sections were calculated for the reaction 48Ca+238U using a statistical model and the obtained fusion cross sections as input values. The results are compared to experimental data.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 31 August 2011

DOI:https://doi.org/10.1103/PhysRevC.86.034608

©2012 American Physical Society

Authors & Affiliations

K. Nishio1, S. Mitsuoka1, I. Nishinaka1, H. Makii1, Y. Wakabayashi2, H. Ikezoe1, K. Hirose3, T. Ohtsuki3, Y. Aritomo1,4, and S. Hofmann5,6

  • 1Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
  • 2Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
  • 3Resarch Center for Electron Photon Science, Tohoku University, 982-0826, Japan
  • 4Flerov Laboratory of Nuclear Reactions, 141 980 Dubna, Russia
  • 5GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
  • 6Institut für Kernphysik, Goethe-Universität Frankfurt, 60438 Frankfurt am Main, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 86, Iss. 3 — September 2012

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×