Low-frequency $K^π=0^{+}$ modes in deformed neutron-rich nuclei: Pairing- and $β$-vibrational modes of neutron

Details Low-frequency $K^π=0^{+}$ modes in deformed neutron-rich nuclei: Pairing- and $β$-vibrational modes of neutron Low-frequency $K^π=0^{+}$ modes in deformed neutron-rich nuclei: Pairing- and $β$-vibrational modes of neutron

2008-02-16

arxiv.org/abs/0802.2341v1

Phys.Rev.C77:044312,2008

Physics

Nuclear Physics

Nuclear Theory

9 pages, 7 figures, and 1 table

Scientific paper

10.1103/PhysRevC.77.044312

Low-frequency $K^{\pi}=0^{+}$ 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 $K^{\pi}=0^{+}$ 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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