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arXiv · 1007.4943

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

C. Force·S. Grévy·L. Gaudefroy·O. Sorlin·L. Caceres·F. Rotaru·J. Mrazek·N. L. Achouri·J. C. Angélique·F. Azaiez·B. Bastin·R. Borcea·A. Buta·J. M. Daugas·Z. Dlouhy·Zs. Dombradi·F. De Oliveira·F. Negoita·Y. Penionzhkevich·M. G. Saint-Laurent·D. Sohler·M. Stanoiu·I. Stefan·C. Stodel·F. Nowacki
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Abstract

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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C. Force, S. Grévy, L. Gaudefroy, O. Sorlin, L. Caceres, F. Rotaru, J. Mrazek, N. L. Achouri, J. C. Angélique, F. Azaiez, B. Bastin, R. Borcea, A. Buta, J. M. Daugas, Z. Dlouhy, Zs. Dombradi, F. De Oliveira, F. Negoita, Y. Penionzhkevich, M. G. Saint-Laurent, D. Sohler, M. Stanoiu, I. Stefan, C. Stodel, F. Nowacki. 2010-07-28. Prolate-Spherical Shape Coexistence at N=28 in $^{44}$S. https://doi.org/10.1103/physrevlett.105.102501

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