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Low-lying two-particle states in the nucleus236Np
Authors:P C Sood
Institution:1. Department of Physics, Banaras Hindu University, Varanasi, India
Abstract:The ambiguities and the uncertainties about the energy levels of the doubly odd actinide nucleus 93 236 Np143 are sought to be removed by determination of the bandhead energies of various two-particle configurations expected to appear in the low energy spectrum of this nucleus. The calculations involve quantitative evaluation of the zero range neutron-proton residual interaction energy contribution to the bandhead energy for each configuration. It is concluded that the ground state is the long-lived isomer with spin-parityI π=6- arising from the configuration {5/2+642] p +7/2?743] n }. Bandhead energies for eight two-particle states appearing upto an excitation energy of 400 keV are presented and the results are discussed in the context of the available and further experiments.
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