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Physical Review C 85 (2012) 024311
In-beam spectroscopic studies of $^{44}$S nucleus
L. Caceres1, D. Sohler, S. Grévy1, O. Sorlin1, Zs. Dombradi, B. Bastin1, 2, N.L. Achouri2, J.C. Angélique2, F. Azaiez3, D. Baiborodin, R. Borcea, C. Bourgeois3, A. Buta, A. Bürger, R. Chapman, J. C. Dalouzy1, Z. Dlouhy, A. Drouard4, Z. Elekes, S. Franchoo3, L. Gaudefroy5, S. Iacob, B. Laurent5, M. Lazar, X. Liang, E. Liénard2, J. Mrazek, L. Nalpas4, F. Negoita, F. Nowacki6, N.A. Orr2, Y. Penionzhkevich, Zs. Podolyak, F. Pougheon3, A. Poves, P. Roussel-Chomaz1, M. G. Saint-Laurent1, M. Stanoiu1, 3, I. Stefan1, 3

The structure of the $^{44}$S nucleus has been studied at GANIL through the one proton knock-out reaction from a $^{45}$Cl secondary beam at 42~A$\cdot$MeV. The $\gamma$ rays following the de-excitation of $^{44}$S were detected in flight using the 70 BaF${_2}$ detectors of the Ch\^{a}teau de Cristal array. An exhaustive $\gamma\gamma$-coincidence analysis allowed an unambiguous construction of the level scheme up to an excitation energy of 3301~keV. The existence of the spherical 2$^+_2$ state is confirmed and three new $\gamma$-ray transitions connecting the prolate deformed 2$^+_1$ level were observed. Comparison of the experimental results to shell model calculations further supports a prolate and spherical shape coexistence with a large mixing of states built on the ground state band in $^{44}$S.
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
2 :  LPCC - Laboratoire de Physique Corpusculaire de Caen
3 :  IPNO - Institut de Physique Nucléaire d'Orsay
4 :  IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)
5 :  DAM/DIF - DAM Île-de-France
6 :  IPHC - Institut Pluridisciplinaire Hubert Curien
structure nucléaire
Physique/Physique Nucléaire Expérimentale
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