β decay of Ca51

The new isotope $^{51}\mathrm{Ca}$ has been observed in the decay of $^{51}\mathrm{K}$ produced by fragmentation of a uranium target with 600-MeV protons. The half-life of $^{51}\mathrm{Ca}$ was determined to be 10.0\ifmmode\pm\else\textpm\fi{}0.8 s; the decay properties were established from $\ensuremath{\gamma}$-ray singles and coincidence measurements. The deexcitation scheme accounts for twenty-two $\ensuremath{\gamma}$ transitions between eleven levels in $^{51}\mathrm{Sc}$. Two states, located at 3039 and 3195 keV, can be related to the excitation of the odd proton in the $2p$ $\frac{3}{2}$ orbital.RADIOACTIVITY $^{51}\mathrm{Ca}$ from $p+U$ at 600 MeV $^{51}\mathrm{K}({\ensuremath{\beta}}^{\ensuremath{-}})$, natural target, mass separated, measured delayed ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$, $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidences, ${T}_{\frac{1}{2}}$, deduced decay scheme, $log\mathrm{ft}$, $J$, $\ensuremath{\pi}$.