Conversion-electron spectroscopy and gamma-gamma angular correlation measurements in 116Sn

Abstract

The 116Sn nucleus was studied via the $\beta^{-}$ decay of 116In utilizing the $8\pi$ spectrometer and its auxiliary detectors at TRIUMF-ISAC. The resulting K-shell conversion coefficients, K/L ratios, and multipole mixing ratios are presented. The $2_{3}^{+} \rightarrow 2_{1}^{+} 931$ keV and $ 2_{2}^{+} \rightarrow 2_{1}^{+} 819$ keV transition mixing ratios were re-measured and found to be $ \delta = +1.8_{-0.5}^{+0.7}$ and $ -1.83(8)$ , respectively. Newly measured mixing ratios for transitions among the low-lying $ I^{\pi} = 4^{+}$ states in 116Sn, when combined with $\gamma$ -ray intensity data, suggest that the 2529 keV $4_{2}^{+}$ state possesses a neutron broken-pair admixture in addition to its dominant proton 2p-2h component.