Properties of the Second Vibrational Level inTe124

Abstract

$\beta \gamma -\gamma$ coincidences in the decay of 60-day ${\mathrm{Sb}}^{124}$ were studied in order to determine the angular correlations in the $\gamma -\gamma$ cascades from the two states of the second vibrational level in ${\mathrm{Te}}^{124}$, and to determine the relative intensities of the beta transitions to these states. We conclude that the state at 1.248 MeV has spin 4 and the one at 1.326 MeV has spin 2, that the 2-2 transition is 94% quadrupole ($\delta =4.1\mathrm{}\pm 0.6$), and that the intensity of the beta transition to the spin-4 state is $\frac{5}{9}$ (±15%) of that to the spin-2 state.