Shape evolution of giant resonances in Nd and Sm isotopes - INSPIRE

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Shape evolution of giant resonances in Nd and Sm isotopes

May 28, 2013

15 pages

Published in:

Phys.Rev.C 88 (2013) 034309

Published: Sep 9, 2013

e-Print:

1305.6437 [nucl-th]

DOI:

10.1103/PhysRevC.88.034309

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Abstract: (APS)

Giant multipole resonances in Nd and Sm isotopes are studied by employing the quasiparticle-random-phase approximation on the basis of the Skyrme energy-density-functional method. Deformation effects on giant resonances are investigated in these isotopes, which manifest a typical nuclear shape change from spherical to prolate shapes. The peak energy, the broadening, and the deformation splitting of the isoscalar giant monopole (ISGMR) and quadrupole (ISGQR) resonances agree well with measurements. The magnitude of the peak splitting and the fraction of the energy-weighted strength in the lower peak of the ISGMR reflect the nuclear deformation. The experimental data on ISGMR, isoscalar giant dipole (ISGDR), and ISGQR are consistent with the nuclear-matter incompressibility K≃210–230 MeV and the effective mass m0*/m≃0.8–0.9. However, the high-energy octupole resonance (HEOR) in 144Sm seems to indicate a smaller effective mass, m0*/m≃0.7–0.8. A further precise measurement of HEOR is desired to determine the effective mass.

Note:

Submitted to Phys. Rev. C

21.10.Re
21.60.Jz
24.30.Cz

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Figures(30)

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