Sn 129 and Sb <mml:mrow…
1982; American Institute of Physics; Volume: 26; Issue: 2 Linguagem: Inglês
10.1103/physrevc.26.621
ISSN1538-4497
AutoresH. Huck, Manuel Pérez, J. J. Rossi,
Tópico(s)Nuclear Physics and Applications
ResumoSamples of $^{129}\mathrm{Sn}$ and $^{129}\mathrm{Sb}$ were obtained by on-line mass-separation techniques applied to $^{235}\mathrm{U}$ thermal-fission products. Half-lives of (6.9\ifmmode\pm\else\textpm\fi{}0.1) and (2.5\ifmmode\pm\else\textpm\fi{}0.1) min have been measured for the $^{129}\mathrm{Sn}$ beta decays. Decay schemes are proposed based on gamma-ray energies and intensities and gamma-gamma coincidence results. A new half-life of (17.7\ifmmode\pm\else\textpm\fi{}0.1) min, besides the well known 4.4 h one, was observed in the $^{129}\mathrm{Sb}$ decay. A level scheme fed by this decay is proposed taking into account our results and previously reported nuclear reactions data. The $^{129}\mathrm{Sb}$ structure is compared with a particle-core coupling calculation.RADIOACTIVITY $^{129}\mathrm{Sn}$ and $^{129}\mathrm{Sb}$ decays [from $^{235}\mathrm{U}({n}_{\mathrm{th}}, f)$]; on-line measured ${E}_{\ensuremath{\gamma}}$, ${I}_{\ensuremath{\gamma}}$, $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidences, ${T}_{\frac{1}{2}}$, Ge(Li) detectors; $^{129}\mathrm{Sb}$ and $^{129}\mathrm{Te}$ deduced levels. Mass-separated $^{129}\mathrm{Sn}$ and $^{129}\mathrm{Sb}$ activities.
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