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Free keywords:
Nuclear Experiment, nucl-ex,Nuclear Theory, nucl-th
MPINP:
Präzisionsexperimente - Abteilung Blaum
Abstract:
We report first precision mass measurements of the ½− isomeric and 9/2+ ground states of 101In. The determined isomeric excitation energy continues a smooth trend of odd-A indium isotopes up to the immediate vicinity of N=50 magic number. This trend can be confirmed by dedicated shell-model calculations only if the neutron configuration mixing is considered. We find that the single-particle energies are different for different states of the same isotope. The presented configuration-dependent shell evolution, type-II shell evolution, in odd-A nuclei is discussed for the first time. Our results will facilitate future studies of single-particle neutron states