Roles of deformation and neutron excess on the giant monopole resonance in neutron-rich Zr isotopes

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.034324· OSTI ID:21419529

Yoshida, Kenichi ^[1]

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1. RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198 (Japan)

We investigate the roles of deformation on the giant monopole resonance (GMR), particularly the mixing of the giant quadrupole resonance (GQR) and the effects of the neutron excess in the well-deformed nuclei around {sup 110}Zr and in the drip-line nuclei around {sup 140}Zr by means of the deformed quasiparticle-random-phase approximation employing the Skyrme and the local-pairing energy-density functionals. It is found that the isoscalar (IS) GMR has a two-peak structure, the lower peak of which is associated with the mixing between the ISGMR and the K{sup {pi}=}0{sup +} component of the ISGQR. The transition strength of the lower peak of the ISGMR grows as the neutron number increases. In the drip-line nuclei, the neutron excitation is dominant over the proton excitation. We find that for an isovector (IV) excitation the GMR has a four-peak structure due to the mixing of the IS and IV modes as well as the mixing of the K{sup {pi}=}0{sup +} component of the IVGQR. In addition to the GMR, we find that the threshold strength is generated by neutrons only.

• OSTI ID: 21419529
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 82; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BINDING ENERGY
CALCULATION METHODS
DEFORMATION
DEFORMED NUCLEI
DENSITY
ELEMENTARY PARTICLES
ENERGY
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
GIANT RESONANCE
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
ISOVECTORS
MONOPOLES
MULTIPOLES
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR DEFORMATION
NUCLEI
NUCLEON-NUCLEON POTENTIAL
NUCLEONS
PAIRING ENERGY
PHYSICAL PROPERTIES
POTENTIALS
PROTONS
QUADRUPOLES
QUASI PARTICLES
RADIOISOTOPES
RANDOM PHASE APPROXIMATION
RESONANCE
SKYRME POTENTIAL
TENSORS
VECTORS
ZIRCONIUM 110
ZIRCONIUM ISOTOPES