Pairing and continuum effects on low-frequency quadrupole vibrations in deformed Mg isotopes close to the neutron drip line

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dc.creatorYoshida, K.
dc.creatorYamagami, M.
dc.creatorMatsuyanagi, K.
dc.date2006-05-27
dc.date.accessioned2026-07-07T07:14:51Z
dc.date.available2026-07-07T07:14:51Z
dc.descriptionLow-frequency quadrupole vibrational modes in deformed $^{36,38,40}$Mg close to the neutron drip line are studied by means of the quasiparticle-random-phase approximation based on the coordinate-space Hartree-Fock-Bogoliubov formalism. Strongly collective $K^π=0^{+}$ and $2^{+}$ excitation modes carrying 10-20 Weisskopf units in the intrinsic isoscalar quadrupole transition strengths are obtained at about 3 MeV. There are two reasons for the enhancement of the transition strengths. First, the quasiparticle wave functions generating these modes possess spatially very extended structure. The asymptotic selection rules characterizing the $β$ and $γ$ vibrations in stable deformed nuclei are thus strongly violated. Second, the dynamic pairing effects act strongly to enhance the collectivity of these modes. It is suggested that the lowest $K^π=0^{+}$ collective mode is a particularly sensitive indicator of the nature of pairing correlations in deformed nuclei close to the neutron drip line.
dc.description23 pages including 11 figures and 8 tables. Submitted to NPA
dc.identifierhttps://arxiv.org/abs/nucl-th/0605073
dc.identifierhttp://arxiv.org/abs/nucl-th/0605073
dc.identifierNucl.Phys. A779 (2006) 99-115
dc.identifierdoi:10.1016/j.nuclphysa.2006.09.003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113054
dc.subjectNuclear Theory
dc.titlePairing and continuum effects on low-frequency quadrupole vibrations in deformed Mg isotopes close to the neutron drip line
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