Low-frequency Kπ=0+ modes in deformed neutron-rich nuclei: Pairing- and β-vibrational modes of neutrons

Kenichi Yoshida and Masayuki Yamagami
Phys. Rev. C 77, 044312 – Published 25 April 2008

Abstract

Low-frequency Kπ=0+ states in deformed neutron-rich nuclei are investigated by means of the quasiparticle-random-phase approximation based on the Hartree-Fock-Bogoliubov formalism in the coordinate space. We have obtained the very strongly collective Kπ=0+ modes not only in neutron-rich Mg isotope but also in Cr and Fe isotopes in N=40 region, where the onset of nuclear deformation has been discussed. It is found that the spatially extended structure of neutron quasiparticle wave functions around the Fermi level brings about a striking enhancement of the transition strengths. It is also found that the fluctuation of the pairing field plays an important role in generating coherence among two-quasiparticle excitations of neutron.

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  • Received 17 February 2008

DOI:https://doi.org/10.1103/PhysRevC.77.044312

©2008 American Physical Society

Authors & Affiliations

Kenichi Yoshida

  • Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan

Masayuki Yamagami

  • Nishina Center for Accelerator-Based Science, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan

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Issue

Vol. 77, Iss. 4 — April 2008

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