Prolate-Spherical Shape Coexistence at N=28 in $^{44}$S

Details Prolate-Spherical Shape Coexistence at N=28 in $^{44}$S Prolate-Spherical Shape Coexistence at N=28 in $^{44}$S

2010-07-28

arxiv.org/abs/1007.4943v1

Physical Review Letters 105 (2010) 102501

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 3 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.105.102501

The structure of $^{44}$S has been studied using delayed $\gamma$ and electron spectroscopy at \textsc{ganil}. The decay rates of the 0$^+_2$ isomeric state to the 2$^+_1$ and 0$^+_1$ states have been measured for the first time, leading to a reduced transition probability B(E2~:~2$^{+}_1$$\rightarrow$0$^{+}_2)$= 8.4(26)~e$^2$fm$^4$ and a monopole strength $\rho^2$(E0~:~0$^{+}_2$$\rightarrow$0$^{+}_1)$ =~8.7(7)$\times$10$^{-3}$. Comparisons to shell model calculations point towards prolate-spherical shape coexistence and a phenomenological two level mixing model is used to extract a weak mixing between the two configurations.

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