Enhanced collectivity in neutron-deficient Sn isotopes in energy functional based collective Hamiltonian

Z. P. Li, C. Y. Li, J. Xiang, J. M. Yao, J. Meng

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

The low-lying collective states in Sn isotopes are studied by a five-dimensional collective Hamiltonian with parameters determined from the triaxial relativistic mean-field calculations using the PC-PK1 energy density functional. The systematics for both the excitation energies of 21+ states and B(E2;01+→21+) values are reproduced rather well, in particular, the enhanced E2 transitions in the neutron-deficient Sn isotopes with N<66. We show that the gradual degeneracy of neutron levels 1g 7/2 and 2d 5/2 around the Fermi surface leads to the increase of level density and consequently the enhanced paring correlations from N=66 to 58. It provokes a large quadrupole shape fluctuation around the spherical shape, and leads to an enhanced collectivity in the isotopes around N=58.

Original languageEnglish
Pages (from-to)470-473
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume717
Issue number4-5
DOIs
Publication statusPublished - 2012 Oct 31

Keywords

  • Collective Hamiltonian
  • Covariant energy density functional
  • Electromagnetic transition
  • Low-lying states
  • Sn isotopes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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