Improved atomic masses ofKr84,86andXe129,132

Abstract

Using single ions in a cryogenic Penning trap we have remeasured the atomic masses of $^{84,86}\mathrm{Kr}$ and $^{129,132}\mathrm{Xe}$ with the results $M[^{84}\mathrm{Kr}]=83.911$ 497 731(8) u, $M[^{86}\mathrm{Kr}]=85.910$ 610 628(8) u, $M[^{129}\mathrm{Xe}]=128.904$ 780 859(11) u, and $M[^{132}\mathrm{Xe}]=131.904$ 155 086(10) u. These results supersede those previously reported by Shi, Redshaw, and Myers [Phys. Rev A 72, 022510 (2005)], which suffered from systematic error associated with the comparison of heavy multicharged ions with singly charged reference ions.