Nuclear levels in Pt 1 9 1 , 1 9 3 , 1 9 5 , 1 9 7 </mml:…
1978; American Institute of Physics; Volume: 17; Issue: 2 Linguagem: Inglês
10.1103/physrevc.17.529
ISSN1538-4497
AutoresG. Berrier-Ronsin, M. Vergnes, G. Rotbard, J. Vernotte, J. Kalifa, R. Seltz, H.L. Sharma,
Tópico(s)Nuclear physics research studies
ResumoThe ($p,d$) 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 $^{197}\mathrm{Pt}$.[NUCLEAR REACTIONS $^{198,196,194,192}(p,d)(d,t)^{197,195,193,191}\mathrm{Pt}$, $E=26$ MeV; measured $\ensuremath{\sigma}(\ensuremath{\theta})$; $^{197}\mathrm{Pt}$, $^{195}\mathrm{Pt}$, $^{193}\mathrm{Pt}$, $^{191}\mathrm{Pt}$ levels deduced, $J$, $\ensuremath{\pi}$, $C^{2}S$. Natural and separated targets.]
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