The isospin-dependent quadrupole-quadrupole interaction used in shell model calculations - The effects of including △N = 2 excitations and a two-body spin-orbit interaction term

M. S. Fayache, Y. Y. Sharon, L. Zamick, S. J. Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of the "B" term in the interaction -XQ(1) · Q(2)[1 + Bτ(1) · τ(2)] was previously considered in the 0p shell (small space). It is now studied in a larger space which additionally includes △N = 2 excitations. When B is made sufficiently negative we still obtain for 10Be, even in the larger space, an unphysical collapse of some of the low-lying states so that their energies are less than the energy of the conventional J = 0- ground state. This effect, however, occurs for values of B considerably more negative than was the case in the smaller space. It is shown that the inclusion of an additional two-body spin-orbit interaction term prevents this unrealistic collapse in both the large and small spaces.

Original languageEnglish (US)
Pages (from-to)385-390
Number of pages6
JournalEuropean Physical Journal A
Volume7
Issue number3
DOIs
StatePublished - 2000

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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