In-beamγ-ray spectroscopy ofCf248,250,252by neutron-transfer reactions using a Cf target

Abstract

The ground-state bands of $^{248,250,252}\mathrm{Cf}$ have been established up to the ${10}^{+}$, ${12}^{+}$, and ${10}^{+}$ states, respectively, by in-beam $\ensuremath{\gamma}$-ray spectroscopy using neutron-transfer reactions with a $153$-MeV $^{18}\mathrm{O}$ beam and a highly radioactive Cf target. The deexcitation $\ensuremath{\gamma}$ rays in $^{248,250,252}\mathrm{Cf}$ were identified by taking coincidences with outgoing particles of $^{16\ensuremath{-}19}\mathrm{O}$ measured with Si $\ensuremath{\Delta}E\ensuremath{-}E$ detectors, and by selecting their kinetic energies. Moments of inertia of $^{248,250,252}\mathrm{Cf}$ were discussed in terms of the $N=152$ deformed shell gap.