β-delayed Proton Decays and Spin Assignmentsof ~(133)Sm and ~(149)Yb

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The experiment was carried out at the Sector-Focusing Cyclotron in IMP. 133Sm was produced via fusion, evaporation in the reaction 40Ca(96Ru,2pn).Itsβ-delayed proton decay was studied by means of “p-γ” coincidence in combination with a He-jet tape transport system, including half-lives, proton energy spectra (Fig. 1),γ-transitions following the proton emissions, and the branching ratios to the low-lying states in the grand-daughter nuclei. The possible spins and parities of 133Sm were extracted by fitting the experi- The experiment was carried out at the Sector-Focusing Cyclotron in IMP. 133Sm was produced via fusion, evaporation in the reaction 40Ca (96Ru, 2pn) .Itsβ-delayed proton decay was studied by means of “p-γ” coincidence in combination with a He-jet tape transport system, including half-lives, proton energy spectra (Fig. 1), γ-transitions following the proton emissions, and the branching ratios to the low-lying states in the grand-daughter nuclei. possible spins and parities of 133Sm were extracted by fitting the experi-
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