Penning trap mass measurements ofCd99−109with the ISOLTRAP mass spectrometer, and implications for therpprocess

Abstract

Penning trap mass measurements of neutron-deficient Cd isotopes $^{99\ensuremath{-}109}\mathrm{Cd}$ have been performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN, all with relative mass uncertainties below $3\ifmmode\cdot\else\textperiodcentered\fi{}{10}^{\ensuremath{-}8}$. A new mass evaluation has been performed. The mass of $^{99}\mathrm{Cd}$ has been determined for the first time, which extends the region of accurately known mass values toward the doubly magic nucleus $^{100}\mathrm{Sn}$. The implication of the results on the reaction path of the $rp$ process in stellar x-ray bursts is discussed. In particular, the uncertainty of the abundance and the overproduction created by the $rp$-process for the mass $A=99$ are demonstrated by reducing the uncertainty of the proton-separation energy of $^{100}\mathrm{In}$${S}_{p}$($^{100}\mathrm{In}$) by a factor of $2.5$.