β decay of In133: γ emission from neutron-unbound states in Sn133
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Abstract
Excited states in $^{133}\mathrm{Sn}$ were investigated through the $\ensuremath{\beta}$ decay of $^{133}\mathrm{In}$ at the ISOLDE facility. The ISOLDE Resonance Ionization Laser Ion Source (RILIS) provided isomer-selective ionization for $^{133}\mathrm{In}$, allowing us to study separately, and in detail, the $\ensuremath{\beta}$-decay branch of $^{133}\mathrm{In}\phantom{\rule{4pt}{0ex}}{\mathrm{J}}^{\ensuremath{\pi}}=(9/{2}^{+}$) ground state and its ${\mathrm{J}}^{\ensuremath{\pi}}=(1/{2}^{\ensuremath{-}}$) isomer. Thanks to the large spin difference of the two $\ensuremath{\beta}$-decaying states of $^{133}\mathrm{In}$, it is possible to investigate separately the lower and higher spin states in the daughter, $^{133}\mathrm{Sn}$, and thus to probe independently different single-particle and single-hole levels. We report here new $\ensuremath{\gamma}$ transitions observed in the decay of $^{133}\mathrm{In}$, including those assigned to the deexcitation of the neutron-unbound states.
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