The properties of 116In excited states

Gamma and conversion electron spectra from the 115In(n,γ)116In reaction in the energy range 20-700 keV and 20-850 keV respectively have been measured with bent crystal and magnetic spectrometers. Gamma-gamma coincidences in the energy range 50-500 keV have been investigated with Ge(Li)-Ge(Li) arrangement. Proton spectra from the 12 MeV deuteron-induced (d,p) reaction taken at the University of Pittsburgh Tandem Van de Graaf accelerator were reanalysed. The 116In levels in the energy range 0-1.4 MeV has been constructed. Parity is determined for all the levels introduced. Unique spin values are assigned to 37 levels. The information obtained was used to place limits to the J-values for the rest of the levels. The main components of the wave function are established for 23 levels, considered to be components of p-n multiplets in which the proton hole and odd neutron are in one of the Z = 28→50 and N = 50→82 shell states, respectively. Energy splittings of p-n configurations by residual interactions taken as a combination of short range Wigner ard singlet forces have been calculated. It is noted that many excited states cannot be described in the framework of two-quasiparticle configurations. (Auth.)