Superdeformed and Triaxial States in $^{42}$Ca

K. Hadyńska-Klȩk M. Zielińska 1 J. Chavas 1 L. Charles 2 P. Désesquelles 3, 4 N. Karkour 5 A. Korichi 4 W. Korten 1 J. Ljungval 1 H. Naïdja 2 A. Lopez-Martens 4 A. Obertelli 1 N. Redon 6 M.-D. Salsac 1 O. Stézowski 6 Ch. Theisen 1
1 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
2 IPHC - Institut Pluridisciplinaire Hubert Curien
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 CSNSM SNO - Centre de Sciences Nucléaires et de Sciences de la Matière
5 CSNSM ELEC
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
6 IPNL - Institut de Physique Nucléaire de Lyon
Abstract : Shape parameters of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca42 were determined from E2 matrix elements measured in the first low-energy Coulomb excitation experiment performed with AGATA. The picture of two coexisting structures is well reproduced by new state-of-the-art large-scale shell model and beyond-mean-field calculations. Experimental evidence for superdeformation of the band built on 0+2 has been obtained and the role of triaxiality in the A∼40 mass region is discussed. Furthermore, the potential of Coulomb excitation as a tool to study superdeformation has been demonstrated for the first time.
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Submitted on : Wednesday, August 31, 2016 - 2:48:42 PM
Last modification on : Tuesday, November 19, 2019 - 2:37:43 AM

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K. Hadyńska-Klȩk, M. Zielińska, J. Chavas, L. Charles, P. Désesquelles, et al.. Superdeformed and Triaxial States in $^{42}$Ca. Physical Review Letters, American Physical Society, 2016, 117, pp.062501. ⟨10.1103/PhysRevLett.117.062501⟩. ⟨in2p3-01358320⟩

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