Pairing effects on the collectivity of quadrupole states aroundMg<mml:mprescripts/><mml:none/>32

2003/07/11 by M. Yamagami, Nguyen Van Giai · 3 citations
Physics and Astronomy · #Atomic and Molecular Physics #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1103/physrevc.69.034301

published as Phys.Rev. C69 (2004) 034301 · 14 pages, 9 figures

arxiv created 2003/07/11 · openalex publication_date 2004/03/01 · arxiv updated 2009/12/01 · openalex created_date 2019/07/30 · openalex updated_date 2026/07/28

Abstract

The first 2⁺ states in N=20 isotones including neutron-rich nuclei ³²Mg and ³⁰Ne are studied by the Hartree-Fock-Bogoliubov plus quasiparticle random phase approximation method based on the Green's function approach. The residual interaction between the quasiparticles is consistently derived from the Hamiltonian density of Skyrme interactions with explicit velocity dependence. The B(E2,0₁⁺\ensuremath→2₁⁺) transition probabilities and the excitation energies of the first 2⁺ states are well described within a single framework. We conclude that pairing effects account largely for the anomalously large B(E2) value and the very low excitation energy in ³²Mg.

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