In-beam γ -ray spectroscopy of Cf 248 , 250 , 252 by neutron-transfer reactions using a Cf target

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.