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Core polarization effects on C4 form factors of sd-shell nuclei

  • R.A. Radhi

Abstract:

Coulomb form factors of C4 transitions in even-even N = Z sd-shell nuclei ( 20Ne, 24Mg, 28Si and 32S) are discussed taking into account higher-energy configurations outside the sd-shell model space which are called core polarization effects. Higher configurations are taken into account through a microscopic theory, which allows particle-hole excitations from the 1s and 1p shells core orbits and also from the 2s1d-shell orbits to the higher allowed orbits with excitations up to 4 ω. The effect of core polarization is found essential in both the transition strengths and momentum transfer dependence of form factors, and gives a remarkably good agreement with the measured data with no adjustable parameters. The calculations are based on the Wildenthal interaction for the sd-shell model space and on the modified surface delta interaction (MSDI) for the core polarization effects.

PACS. 25.30.Dh Inelastic electron scattering to specific states – 21.60.Cs Shell model – 27.30.+t 20 ⩽ A ⩽ 38 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2003

Authors and Affiliations

  • R.A. Radhi
    • 1
  1. 1.Department of Physics, College of Science, University of Baghdad, Baghdad, IraqIQ

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