Atomic masses of ${}^{82,83}$Kr and ${}^{131,134}$Xe

The atomic masses of ${}^{82,83}$Kr and ${}^{131,134}$Xe have been measured using the Florida State Penning trap mass spectrometer with ${}^{84,86}$Kr and ${}^{129,132}$Xe used as reference masses. The results are $M$(${}^{82}$Kr) $=$ 81.913 481 159(9) u, $M$(${}^{83}$Kr) $=$ 82.914 126 519(12) u, $M$(${}^{131}$Xe) $=$ 130.905 084 137(14) u, and $M$(${}^{134}$Xe) $=$ 133.905 393 032(13) u.

Figure 1

Average cyclotron frequency ratio shift per mass difference of the ion pair for suboptimal values of the inner and outer cyclotron radii ρ${}_{\mathrm{ci}}$ and ρ${}_{\mathrm{ck}}$, relative to the ratio obtained with optimal values, before (squares) and after (circles) applying the systematic corrections. The error bars of the uncorrected ratio shifts indicate the statistical uncertainty; the error bars of the corrected ratio shift indicate the total uncertainty.