Microscopic description of excitation of nuclear isoscalar giant resonances by inelastic scattering of 240 MeV {alpha} particles

Journal Article · Wed Mar 01 04:00:00 EST 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.61.034312· OSTI ID:20215665

Kolomiets, A ^[1]; Pochivalov, O ^[1]; Shlomo, S ^[1]

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1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)

A microscopic description of the excitation of isoscalar giant monopole resonance (ISGMR) and quadrupole resonance (ISGQR) in {sup 28}Si, {sup 40}Ca, {sup 58}Ni, and {sup 116}Sn by 240 MeV bombarding energy {alpha} particles is provided based on self-consistent Hartree-Fock- (HF-) random-phase-approximation (RPA) approach and the distorted-wave Born approximation (DWBA). The folding model is used to obtain optical potentials from the HF ground-state density and a density dependent Gaussian nucleon-{alpha} interaction (V{sub {alpha}}{sub n}). The parameters of V{sub {alpha}}{sub n} are determined by fitting experimentally measured angular distributions for the case of elastic scattering. Angular distributions of inelastically scattered {alpha} particles for ISGMR and ISGQR excitations of the target nucleus are obtained using the folding model DWBA and both microscopic (RPA) and hydrodynamical (collective model) transition densities (found from HF ground state densities). A possible overestimation of the energy weighted sum rules and shifts of centroid energies due to the collective-model-based DWBA reaction description is reported. (c) 2000 The American Physical Society.

• OSTI ID: 20215665
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 61; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
CALCIUM 40 TARGET
DISTORTED WAVE THEORY
GIANT RESONANCE
HARTREE-FOCK METHOD
INELASTIC SCATTERING
NICKEL 58 TARGET
RANDOM PHASE APPROXIMATION
SILICON 28 TARGET
THEORETICAL DATA
TIN 116 TARGET