/ Experiment-Nucl arXiv:1007.4943


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


Force, C. (GANIL) ; Grevy, S. (GANIL) ; Gaudefroy, L. (CEA DAM) ; Sorlin, O. (GANIL) ; Caceres, L. (GANIL) ; Rotaru, F. (Bucharest, IFIN-HH) ; Mrazek, J. (Rez, Nucl. Phys. Inst.) ; Achouri, N.L. (Caen U.) ; Angelique, J.C. (Caen U.) ; Azaiez, F. (Orsay) ; Bastin, B. (Caen U.) ; Borcea, R. (Bucharest, IFIN-HH) ; Buta, A. (Bucharest, IFIN-HH) ; Daugas, J.M. (CEA DAM) ; Dlouhy, Z. (Rez, Nucl. Phys. Inst.) ; Dombradi, Zs. (Debrecen, Inst. Nucl. Res.) ; De Oliveira, F. (GANIL) ; Negoita, F. (Bucharest, IFIN-HH) ; Penionzhkevich, Y. (Dubna, JINR) ; Saint-Laurent, M.G. (GANIL) ; Sohler, D. (Debrecen, Inst. Nucl. Res.) ; Stanoiu, M. (Bucharest, IFIN-HH) ; Stefan, I. (GANIL) ; Stodel, C. (GANIL) ; Nowacki, F. (Paris U., VI-VII)

Published in: Phys.Rev.Lett.
Year: 2010
Vol.: 105
Page No: 102501
Pages: 5

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.

Web-Page: http://inspirebeta.net/record/863346/files/fig1.png; http://inspirebeta.net/record/863346/files/fig2b.png; http://inspirebeta.net/record/863346/files/fig3.png

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