Structure and directional-correlation measurements inTc97fromMo97(p,n)Tc*97(γ) spectrometry

The level structure and the decay properties of levels in ${}_{}{}^{97}{}_{}{}^{}\mathrm{Tc}$ up to 2208 keV excitation have been investigated via measurements of excitation functions of singles $\gamma$ rays and via $\gamma \gamma$-coincidence experiments following the ${}_{}{}^{97}{}_{}{}^{}\mathrm{Mo}$($p$,$n\gamma$) reaction with proton energies between 1.5 and 8.0 MeV. From these experiments and from high resolution singles energy and directional-correlation measurements an extended scheme has been obtained which includes 69 levels of which about 40 are new. The directional correlations provided unique $J^{\pi }$ assignments for 14 levels, limits for a few others, and multipole mixing ratios for several electromagnetic transitions. The results are compared with unified model calculations.