title: Prolate-spherical shape coexistence at N=28 in 44S.
abstract: The structure of 44S has been studied by using delayed γ and electron spectroscopy. The decay rates of the 02+ isomeric state to the 2(1)+ and 0(1)+ states, measured for the first time, lead to a reduced transition probability B(E2: 2(1)+→0(2)+)=8.4(26) e(2) fm4 and a monopole strength ρ2(E0: 0(2)+→0(1)+)=8.7(7)×10(-3). Comparisons to shell model calculations point towards prolate-spherical shape coexistence, and a two-level mixing model is used to extract a weak mixing between the two configurations.
authors.affiliation: Grand Accélérateur National d'Ions Lours (GANIL), CEA/DSM-CNRS/IN2P3, Caen, France.
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