Nuclear levels inPt191,193,195,197excited via neutron pickup

The ($p,d$) reaction has been performed at 26 MeV incident energy on targets of ${}_{}{}^{196}{}_{}{}^{}\mathrm{Pt}$ (97.5%), ${}_{}{}^{194}{}_{}{}^{}\mathrm{Pt}$ (97.4%), and ${}_{}{}^{192}{}_{}{}^{}\mathrm{Pt}$ (57%) and natural Pt. The deuterons were detected in the focal plane of the split pole magnetic spectrometer with a resolution of 16 to 20 keV full width at half maximum. In ${}_{}{}^{193}{}_{}{}^{}\mathrm{Pt}$, 32 levels, 23 of which are observed for the first time, are populated below 1250 keV; in ${}_{}{}^{195}{}_{}{}^{}\mathrm{Pt}$, 24 levels are observed below 1200 keV; in ${}_{}{}^{191}{}_{}{}^{}\mathrm{Pt}$, due to low enrichment and target uniformity problems, only 7 levels are clearly separated. Comparison of the measured angular distributions with distorted-wave Born-approximation calculations allows parity assignments and spin limits for most of the final levels. Spectroscopic factors are deduced. A cursory investigation of the ($d,t$) reaction on the same targets with about 10 keV resolution has permitted us to separate several clustered low lying levels and to identify and study, using a ${}_{}{}^{198}{}_{}{}^{}\mathrm{Pt}$ target, a few levels of ${}_{}{}^{197}{}_{}{}^{}\mathrm{Pt}$.