Abstract

The intrinsic energy levels in the doubly odd isotopes of Np with mass number 238 and of Am with mass numbers 240, 242 and 244 are calculated using the zero-range neutron-proton residual interaction whose parameters are evaluated using the atomic masses and the ground state Gallagher-Moszkowski splitting energy in each case. A configuration dependence of the residual interaction is in evidence in several cases. The results are compared with the experimental data and the comparison is used to check on the two-particle configuration assignments to the intrinsic states in the respective spectra. Encouraged by the nature and the degree of the agreement of the theory with the available experimental data, predictions are made about the expected location of the as yet unobserved two-quasiparticle states in these nuclei.

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