The atomic masses of ${}^{32}\mathrm{S}$, ${}^{84,86}\mathrm{Kr}$, and ${}^{129,132}\mathrm{Xe}$ have been measured by comparing cyclotron frequencies of single ions in a Penning trap. The results (with one standard deviation uncertainties) are $M\left({}^{32}\mathrm{S}\right)=31.9720711735\left(16\right)$, $M\left({}^{84}\mathrm{Kr}\right)=83.9114977705\left(50\right)$, $M\left({}^{86}\mathrm{Kr}\right)=85.9106106722\left(84\right)$, $M\left({}^{129}\mathrm{Xe}\right)=128.904780960\left(10\right)$, and $M\left({}^{132}\mathrm{Xe}\right)=131.9041551907\left(92\right)$. Combining our mass of ${}^{32}\mathrm{S}$ with the high-precision mass difference between ${}^{33}\mathrm{S}^{+}$ and ${}^{32}\mathrm{S}{\mathrm{H}}^{+}$ obtained by Rainville et al. [submitted to Nature], we also obtain $M\left({}^{33}\mathrm{S}\right)=32.9714589087\left(16\right)$. These results are more precise than previous data by factors of 13 to 600.

• Received 30 March 2005

DOI:https://doi.org/10.1103/PhysRevA.72.022510