Determination of energy gap directly from phase shift for nuclear systems with large neutron excess

murila, musungu

Abstract

Considering 1S0 pairing in infinite neutron matter and nuclear matter, and knowing the fact that in the lowest order approximation, the pairing interaction has been taken to be the bare nucleon-nucleon interaction in the 1S0 channel, the energy gap has been determined directly from the 1S0 phase shifts. The values of energy gaps have been found to increase rapidly for low values of phase shifts, up to around 16°, and it is roughly constant with a value approximately equal to 1.08 MeV for phase shifts1 greater than 16°.

Keyword(s)

Energy gap; Phase shifts; nuclear systems; Large neutron excess

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