{Delta} excitations in compressed finite nuclei. II. Nucleon-nucleon interaction dependence

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.3035· OSTI ID:397698

Hasan, M A ^[1]; Vary, J P ^[2]

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1. Max Planck Institute for Nuclear Physics, Heidelberg (Germany)
2. Institute for Theoretical Physics, University of Heidelberg, D-69120 Heidelberg (Germany)

Spherical Hartree-Fock calculations at equilibrium and under radial compression are presented for {sup 40}Ca and {sup 90}Zr in a model space of seven major oscillator shells. We employ an effective baryon-baryon interaction which includes the {Delta}(1236) resonance explicitly. The nucleon-nucleon ({ital N}-{ital N}) interactions are based on the Nijmegen and Reid soft core potentials. The results indicate a significant dependence on the choice of the {ital N}-{ital N} interaction at large nuclear compression. We found mixing between nucleons and {Delta}{close_quote}s even at equilibrium in {sup 90}Zr with either choice of potentials, but not in {sup 40}Ca. Substantial amounts of the excitation energy induced by compression goes to the creation of {Delta} excitations. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Iowa State University
• DOE Contract Number: FG02-87ER40371
• OSTI ID: 397698
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARYON-BARYON INTERACTIONS
CALCIUM 40
COMPRESSION
DELTA-1232 BARYONS
EQUILIBRIUM
EXCITATION
HARTREE-FOCK METHOD
MIXING
NUCLEON-NUCLEON INTERACTIONS
OSCILLATORS
ZIRCONIUM 90