Mean-field analysis of ground-state and low-lying electric dipole strength in C22

T. Inakura, W. Horiuchi, Y. Suzuki, and T. Nakatsukasa
Phys. Rev. C 89, 064316 – Published 26 June 2014

Abstract

Properties of neutron-rich C22 are studied using the mean-field approach with Skyrme energy density functionals. Its weak binding and large total reaction cross section, which are suggested by recent experiments, are simulated by modifying the central part of Skyrme potential. Calculating E1 strength distribution by using the random-phase approximation, we investigate developments of low-lying electric dipole (E1) strength and the contribution of core excitations of C20. As the neutron Fermi level approaches the zero-energy threshold (ɛF1 MeV), we find that the low-lying E1 strength exceeds the energy-weighted cluster sum rule, which indicates the importance of core excitations with the 1d5/2 orbit.

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  • Received 20 January 2014
  • Revised 30 April 2014

DOI:https://doi.org/10.1103/PhysRevC.89.064316

©2014 American Physical Society

Authors & Affiliations

T. Inakura1, W. Horiuchi2, Y. Suzuki3,4, and T. Nakatsukasa4,5

  • 1Department of Physics, Graduate School of Science, Chiba University, Chiba 263-8522, Japan
  • 2Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
  • 3Department of Physics, Niigata University, Niigata 950-2181, Japan
  • 4RIKEN Nishina Center, Wako 351-0198, Japan
  • 5Center for Computational Sciences, University of Tsukuba, Tsukuba 305-8571, Japan

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Issue

Vol. 89, Iss. 6 — June 2014

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