Evolution of triaxial shapes at large isospin: Rh isotopes

A. Navin 1, * M. Rejmund 1 S. Bhat 2 R. Palit G. Bhat A. Sheikh A. Lemasson 1 S. Bhattacharya 2 M. Caamaño 3 E. Clément 1 O. Delaune 1 F. Farget 1 G. de France 1 B. Jacquot 1
* Corresponding author
1 GANIL - Grand Accélérateur National d'Ions Lourds
2 Variable Energy Cyclotron Centre
3 USC - Universidade de Santiago de Compostela [Spain]
Abstract : The rotational response as a function of neutron–proton asymmetry for the very neutron-rich isotopes of Rh (116–119Rh) has been obtained from the measurement of prompt γ rays from isotopically identified fragments, produced in fission reactions at energies around the Coulomb barrier. The measured “signature” splitting of the yrast bands, when compared with the Triaxial Projected Shell Model (TPSM) calculations, shows the need for large, nearly constant, triaxial deformations. The present results are compared with global predictions for the existence of non axial shapes in the periodic table in the case of very neutron-rich nuclei Rh isotopes. The predicted trend of a second local maximum for a triaxial shape around N∼74 is not found.
Keywords : Isotopic identification of fission fragments Neutron rich Rh isotopes Triaxial projected shell model Nuclear triaxiality
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Submitted on : Monday, November 21, 2016 - 10:53:08 AM
Last modification on : Tuesday, July 9, 2019 - 2:52:50 PM

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A. Navin, M. Rejmund, S. Bhat, R. Palit, G. Bhat, et al.. Evolution of triaxial shapes at large isospin: Rh isotopes. Physics Letters B, Elsevier, 2017, 767, pp.480-484. ⟨10.1016/j.physletb.2016.11.020⟩. ⟨in2p3-01399926⟩

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