Penning trap mass measurement ofBr72

The Low Energy Beam and Ion Trap (LEBIT) Penning trap mass spectrometer was used to perform an improved-precision mass measurement of $^{72}\mathrm{Br}$ and the low-lying isomeric state, $^{72m}\mathrm{Br},$ giving mass excesses of $\ensuremath{-}59\phantom{\rule{0.16em}{0ex}}062.2(1.0)\phantom{\rule{0.16em}{0ex}}\mathrm{keV}$ and $\ensuremath{-}58\phantom{\rule{0.16em}{0ex}}960.9(1.2)\phantom{\rule{0.16em}{0ex}}\mathrm{keV}$, respectively. These values are consistent with the values from the 2012 atomic mass evaluation [Chin. Phys. C 36, 1603 (2012)] and the Nubase2012 evaluation of nuclear properties [Chin. Phys. C 36, 1157 (2012)]. The uncertainties on the mass of the ground state and isomeric state have been reduced by a factor of seven.