PROTON-NEUTRON MULTIPLET STATES IN SB-112

Excited states of Sb-112 were investigated through the Sn-112(p,n gamm a)Sb-112 reaction. gamma-ray, gamma gamma-coincidence, and internal co nversion electron spectra were measured with Ge(HP) gamma and supercon ducting magnetic lens plus Si(Li) electron spectrometers at 8.5, 8.9, 9.1, and 9.3 MeV bombarding proton energies. A significantly extended level scheme was constructed. Spins and parities have been assigned to the levels from Hauser-Feshbach analysis of reaction cross sections, internal conversion coefficients, angular distribution of the gamma ra ys, and decay properties of the states. The low lying states were assi gned to proton-neutron multiplets on the basis of their decay properti es. The energy splitting of these multiplets have been calculated usin g the parabolic rule.