Triaxiality at high spins in Nd nuclei

C.M. Petrache , A. Neusser-Neffgen , H. Hubel , A. Al-Khatib , P. Bringel , A. Burger , N. Nenoff , G. Schonwasser , A.K. Singh , M. Fantuzi , D. Mengoni , G.B. Hagemann , B. Herskind , D.R. Jensen , G. Sletten , P. Fallon , A. Gorgen , P. Bednarczyk (1) , D. Curien (1) , G. Gangopadhyay , A. Korichi (2) , A. Lopez-Martens (2) , B.V.T. Rao , T.S. Reddy , N. Singh , I. Ragnarsson

1 DRS-IPHC - Département Recherches Subatomiques
2 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

The level structure of Nd-140(80) has been established up to spin 48 by in-beam gamma-ray spectroscopy using the Zr-96(Ca-48, 4n) reaction. High-fold gamma-ray coincidences were measured with the EUROBALL spectrometer. Twelve new rotational bands have been discovered at high spins, showing the change from a spherical single-particle behaviour at low spins to a deformed regime with stable triaxiality at high spins. Possible configurations are assigned to the observed bands on the basis of configuration-dependent cranked Nilsson-Strutinsky calculations.

Mots clés: EUROBALL

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

C.M. Petrache, A. Neusser-Neffgen, H. Hubel, A. Al-Khatib, P. Bringel, et al.. Triaxiality at high spins in Nd nuclei. International Conference on Finite Fermionic Systems: Nilsson Model 50 Years, Jun 2005, Lund, Sweden. pp.212-213, ⟨10.1088/0031-8949/2006/T125/056⟩. ⟨in2p3-00089300⟩