Phys. Rev. C 75, 057304 (2007) [4 pages]Origin of 21+ excitation energy dependence on valence nucleon numbersReceived 12 March 2007; published 15 May 2007 It has been shown recently that a simple formula in terms of the valence nucleon numbers and the mass number can describe the essential trends of excitation energies of the first 2+ states in even-even nuclei. By evaluating the first order energy shift due to the zero-range residual interaction, we find that the factor which reflects the effective particle number participating in the interaction from the Fermi orbit governs the main dependence of the first 2+ excitation energy on the valence nucleon numbers. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.75.057304
DOI:
10.1103/PhysRevC.75.057304
PACS:
21.10.Re, 23.20.Lv
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