Fast neutrons were produced with deuteron beams of 27 MeV and 800 nA from the ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$${(}^2$H,n) reaction. These neutrons induced, in turn, natural-uranium fission. Samples of ${}_{}{}^{123}{}_{}{}^{}\mathrm{Ag}$ were obtained by means of on-line mass separation techniques applied to the fission products. The half-life of the ${\beta }^{\mathrm{-}}$ decaying ${}_{}{}^{123}{}_{}{}^{}\mathrm{Ag}$ was measured to be 0.35±0.04 s in agreement with previously reported data. The energy level scheme of ${}_{}{}^{123}{}_{}{}^{}\mathrm{Cd}$ was built from the obtained experimental results and is reported for the first time. Spins and parities for the most important states were suggested based upon logT values obtained from measured γ-ray transition intensities. The most important characteristics are discussed and nuclear structure properties are inferred.

• Received 4 January 1989

DOI:https://doi.org/10.1103/PhysRevC.40.1384