Isomeric excitation energy for ${}^{99}$In${}^m$ from mass spectrometry reveals constant trend next to doubly magic ${}^{100}$Sn

L. Nies, D. Atanasov, M. Athanasakis-Kaklamanakis +16

The excitation energy of the 1/2${}^{-}$ isomer in ${}^{99}$In at $N=50$ is measured to be 671(37) keV and the mass uncertainty of the 9/2${}^{+}$ ground state is significantly reduced usi…