Low-lying Dipole Modes in $^{26,28}$Ne in the Quasiparticle Relativistic Random Phase Approximation

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dc.creatorCao, Li-Gang
dc.creatorMa, Zhong-Yu
dc.date2005-01-06
dc.date.accessioned2026-07-07T12:43:04Z
dc.date.available2026-07-07T12:43:04Z
dc.descriptionThe low-lying isovector dipole strengths in neutron rich nuclei $^{26}$Ne and $^{28}$Ne are investigated in the quasiparticle relativistic random phase approximation. Nuclear ground state properties are calculated in an extended relativistic mean-field theory plus BCS method where the contribution of the resonant continuum to pairing correlations is properly treated. Numerical calculations are tested in the case of isovector dipole and isoscalar quadrupole modes in the neutron rich nucleus $^{22}$O. It is found that in present calculation low-lying isovector dipole strengths at $E_x < 10$ MeV in nuclei $^{26}$Ne and $^{28}$Ne exhaust about 4.9% and 5.8% of the Thomas-Reiche-Kuhn dipole sum rule, respectively. The centroid energy of the low-lying dipole excitation is located at 8.3 MeV in $^{26}$Ne and 7.9 MeV in $^{28}$Ne.
dc.description20pages 5 figures. Accepted for publication in Physical Review C
dc.identifierhttps://arxiv.org/abs/nucl-th/0501016
dc.identifierhttp://arxiv.org/abs/nucl-th/0501016
dc.identifierPhys.Rev.C71:034305,2005
dc.identifierdoi:10.1103/PhysRevC.71.034305
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220293
dc.subjectNuclear Theory
dc.titleLow-lying Dipole Modes in $^{26,28}$Ne in the Quasiparticle Relativistic Random Phase Approximation
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