Abstract:
The effect of the “B” term in the interaction −χQ(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 ΔN = 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.
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Received: 9 November 1999 / Revised version: 11 January 2000
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Fayache, M., Sharon, Y., Zamick, L. et al. The isospin-dependent quadrupole-quadrupole interaction used in shell model calculations – the effects of including ΔN = 2 excitations and a two-body spin-orbit interaction term . EPJ A 7, 385–390 (2000). https://doi.org/10.1007/PL00013620
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DOI: https://doi.org/10.1007/PL00013620