The peak corresponding to the ground state of ${}_{}{}^{197}{}_{}{}^{}\mathrm{Hg}$, in the ${}_{}{}^{199}{}_{}{}^{}\mathrm{Hg}$($p$,$t$)${}_{}{}^{197}{}_{}{}^{}\mathrm{Hg}$ reaction at 25 MeV, has been observed both with natural Hg and with a separated ${}_{}{}^{199}{}_{}{}^{}\mathrm{Hg}$ target. The determined $Q$ value, $Q=-6658\mathrm{}\pm 8$ keV, disagrees with previous measurements.

NUCLEAR REACTIONS ${}_{}{}^{199}{}_{}{}^{}\mathrm{Hg}$($p$,$t$)${}_{}{}^{197}{}_{}{}^{}\mathrm{Hg}$, $E=25\mathrm{}$ MeV; $Q$ value measured, mass excess inferred.

• Received 28 December 1981

DOI:https://doi.org/10.1103/PhysRevC.25.2848