Abstract
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 energy “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.
Highlights
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
Möller et al [17] made a systematic study to investigate the sensitivity of the ground-state nuclear masses with the inclusion of axial asymmetry, for nuclei both near and far from stability
These calculations showed that the effect of axial asymmetry is maximum around Z = 44, N = 64 and predicted another additional region of increased triaxiality around N ∼ 74 for these elements
Summary
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.
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