S -State Interactions in Effective Two-Body Forces

1 May 1964

journal article
Published by Oxford University Press (OUP) in Progress of Theoretical Physics

Vol. 31 (5) , 765-771
https://doi.org/10.1143/ptp.31.765

Abstract

The energy level spectrum of Ni⁵⁸ has been analyzed on the simple considerations of pure singlet s-state forces. By taking the single-particle energy (p_3/2-f_5/2 spacing) as a free parameter, the best fit is obtained for Δ≈0.9 MeV which is in fair agreement with the experimentally suspected value of 0.85 MeV for the single particle level of Ni⁵⁷. Many more, as yet unobserved, levels are predicted in the energy range of 2.5–3.2 MeV and it is pointed out that their exact location would be very helpful in understanding the detailed nature of the two-body forces. Finally the extension of the above analysis of the three particle configuration suggests a 3/2⁻ ground state for Ni⁵⁹.

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