Direct observation of an isomeric state in 98Rb and nuclear properties of exotic rubidium isotopes measured by laser spectroscopy

T. J. Procter, J. A. Behr, J. Billowes, F. Buchinger, B. Cheal, J. E. Crawford, J. Dilling, A. B. Garnsworthy, A. Leary, C. D.P. Levy, E. Mané, M. R. Pearson, O. Shelbaya, M. Stolz, W. Al Tamimi, A. Voss

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17 Scopus citations

Abstract

Fast-beam collinear laser spectroscopy experiments on rubidium have been performed at the ISAC radioactive ion beam facility at TRIUMF. Most recently, the neutron-rich 98Rb isotope has been studied for the investigation of shape coexistence. Two long-lived nuclear states in 98Rb have been clearly observed for the first time: a low-spin state, assigned a spin of I = 0, and a high-spin state. The high-spin state is tentatively assigned a spin of I = 3 based on this analysis in combination with gamma decay results. The measured nuclear properties of the two states are presented, alongside unpublished values of the neutron-deficient isotopes investigated previously. The mean-square charge radii of both states in 98Rb are observed to continue along the isodeformation line present after the N = 60 onset of deformation.

Original languageEnglish
Article number23
Pages (from-to)1-9
Number of pages9
JournalEuropean Physical Journal A
Volume51
Issue number2
DOIs
StatePublished - 2015
Externally publishedYes

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