Structure of 116Sb nucleus.

Abstract

The \ensuremath{\gamma}-ray and internal conversion electron spectra of the $^{113}\mathrm{In}$(\ensuremath{\alpha},n\ensuremath{\gamma}${)}^{116}$Sb reaction have been measured at 14.5 and 16.0 MeV bombarding \ensuremath{\alpha}-particle energies with Ge(HP) \ensuremath{\gamma} and superconducting magnetic lens plus Si(Li) electron spectrometers. The energies and relative intensities of 189 $^{116}\mathrm{Sb}$ \ensuremath{\gamma} rays (including 117 new ones), as well as internal conversion coefficients of 59 $^{116}\mathrm{Sb}$ transitions, have been determined. \ensuremath{\gamma}\ensuremath{\gamma} coincidences have also been measured at ${\mathit{E}}_{\mathrm{\ensuremath{\alpha}}}$=16 MeV. Both low-spin and high-spin level schemes have been deduced and 32 new levels have been identified. Multipolarities of transitions and \ensuremath{\gamma}-ray branching ratios have been determined. The energy spectrum and electromagnetic properties have been calculated in the interacting-boson-fermion-fermion model (IBFFM), and satisfactory agreement between the experimental and theoretical results has been obtained.