Shell-model and Hartree-Fock calculations for even-mass O, Ne, and Mg nuclei

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.034312· OSTI ID:6470070

Siiskonen, T; Lipas, P O ^[1]; Rikovska, J ^[2]

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1. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40351 Jyvaeskylae (Finland)
2. Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU (United Kingdom) Department of Chemistry, University of Maryland, College Park, Maryland 20742 (United States)

Shell-model and deformed Hartree-Fock plus BCS calculations are reported for even-even nuclei [sup 18[minus]30]O, [sup 18[minus]36]Ne, and [sup 20[minus]42]Mg; shell-model calculations additionally included [sup 38,40]Ne and [sup 44,46,48]Mg. Ground-state binding energies and 2[sub 1][sup +] quadrupole moments are calculated by both models. Shell-model calculations, aided by a new truncation method, include 2[sub 1][sup +] excitation energies and magnetic moments. Hartree-Fock calculations with SkI6, RATP, Z[sub [sigma]][sup [asterisk]], and SkX Skyrme forces include ground-state deformations and rms radii; SkI6 gives the best overall agreement with experiment. The two models are compared with each other and with experiment. Two-neutron separation energies, evidence for a neutron halo or skin in heavy O isotopes, and deformation of Ne and Mg isotopes are discussed. Both models indicate disappearance of the shell gap at N=28 (Mg), and the shell model does so additionally at N=20 (Ne and Mg). [copyright] [ital 1999] [ital The American Physical Society]

• OSTI ID: 6470070
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Vol. 60:3; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663120 -- Nuclear Structure Models & Methods-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
BCS THEORY
BINDING ENERGY
CALCULATION METHODS
DEFORMATION
DEFORMED NUCLEI
ELEMENTS
ENERGY
EVEN-EVEN NUCLEI
FLUIDS
GASES
HARTREE-FOCK METHOD
MAGNESIUM
MATHEMATICAL MODELS
METALS
NEON
NONMETALS
NUCLEAR DEFORMATION
NUCLEAR FORCES
NUCLEAR HALOS
NUCLEAR MODELS
NUCLEI
OXYGEN
QUADRUPOLE MOMENTS
RARE GASES
SHELL MODELS