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23 April 2024

» arxiv » 1705.4449

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Precision mass measurements of neutron-rich Cd isotopes and isomers approaching the $N=82$ closed shell
D. Lascar ; R. Klawitter ; C. Babcock ; E. Leistenschneider ; S. R. Stroberg ; B.R. Barquest ; A. Finlay ; M. Foster ; A.T. Gallant ; P. Hunt ; J. Kelly ; B. Kootte ; Y. Lan ; S.F. Paul ; M.L. Phan ; M.P. Reiter ; B. Schultz ; D. Short ; J. Simonis ; C. Andreoiu ; M. Brodeur ; I. Dillmann ; G. Gwinner ; J.D. Holt ; A.A. Kwiatkowski ; J. Dilling ;
Date:	12 May 2017
Abstract:	We present the results of precision mass measurements of neutron-rich cadmium isotopes. These nuclei approach the $N=82$ waiting point in the astrophysical emph{r}-process and are also important to nuclear structure as they lie near doubly-magic $^{132}$Sn on the chart of nuclides. Of particular note is the clear identification of the ground state mass in $^{127}$Cd along with the isomeric state. We show that the ground state identified in a previous mass measurement which dominates the mass value in the Atomic Mass Evaluation is, in fact, an isomeric state. In addition to $^{127/m}$Cd, we present other cadmium masses measured ($^{125/m}$Cd and $^{126}$Cd) in a recent TITAN experiment at TRIUMF. Finally, we compare our measurements to new ab initio shell-model calculations and comment on the state of the field in the $N=82$ region.
Source:	arXiv, 1705.4449
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