Collectivity in {sup 41}S
2011
Yrast states in the neutron-rich {sup 41}S nucleus have been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of {sup 36}S ions with a thin {sup 208}Pb target. The magnetic spectrometer, PRISMA, and the {gamma}-ray array, CLARA, were used in the measurements. {gamma}-ray transitions of energy 449 and 638 keV were observed. Results from published intermediate-energy Coulomb excitation measurements in combination with those from the present work have led to the construction of a new {sup 41}S level scheme. Proposed J{sup {pi}} values are based on experimental observation and on model-dependent arguments. The level scheme and published electromagnetic transition probabilities are discussed within the context of state-of-art shell-model calculations using the SDPF-U effective interaction. In contrast with the excellent agreement observed in earlier published work, here there are significant discrepancies between experiment and the results of shell-model calculations.
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