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

Abstract

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]

Authors:
;  [1];  [2]
  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))
Publication Date:
OSTI Identifier:
6470070
Alternate Identifier(s):
OSTI ID: 6470070
Resource Type:
Journal Article
Journal Name:
Physical Review, C
Additional Journal Information:
Journal Volume: 60:3; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BCS THEORY; BINDING ENERGY; DEFORMED NUCLEI; EVEN-EVEN NUCLEI; HARTREE-FOCK METHOD; MAGNESIUM; NEON; NUCLEAR DEFORMATION; NUCLEAR FORCES; NUCLEAR HALOS; OXYGEN; QUADRUPOLE MOMENTS; SHELL MODELS; ALKALINE EARTH METALS; CALCULATION METHODS; DEFORMATION; ELEMENTS; ENERGY; FLUIDS; GASES; MATHEMATICAL MODELS; METALS; NONMETALS; NUCLEAR MODELS; NUCLEI; RARE GASES 663110* -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-); 663120 -- Nuclear Structure Models & Methods-- (1992-)

Citation Formats

Siiskonen, T., Lipas, P.O., and Rikovska, J. Shell-model and Hartree-Fock calculations for even-mass O, Ne, and Mg nuclei. United States: N. p., 1999. Web. doi:10.1103/PhysRevC.60.034312.
Siiskonen, T., Lipas, P.O., & Rikovska, J. Shell-model and Hartree-Fock calculations for even-mass O, Ne, and Mg nuclei. United States. doi:10.1103/PhysRevC.60.034312.
Siiskonen, T., Lipas, P.O., and Rikovska, J. Wed . "Shell-model and Hartree-Fock calculations for even-mass O, Ne, and Mg nuclei". United States. doi:10.1103/PhysRevC.60.034312.
@article{osti_6470070,
title = {Shell-model and Hartree-Fock calculations for even-mass O, Ne, and Mg nuclei},
author = {Siiskonen, T. and Lipas, P.O. and Rikovska, J.},
abstractNote = {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]},
doi = {10.1103/PhysRevC.60.034312},
journal = {Physical Review, C},
issn = {0556-2813},
number = ,
volume = 60:3,
place = {United States},
year = {1999},
month = {9}
}