Electron-γ angular correlations in134Ba

Abstract

Electron-\ensuremath{\gamma} directional correlation measurements have been done in ${}^{134}\mathrm{Ba}$ for the first time using an apparatus including cooled Si surface barrier detector for the electrons and HPGe for the \ensuremath{\gamma}'s. Experimental particle parameters for pure intense E2 transitions have been calculated from \ensuremath{\gamma}\ensuremath{\gamma} and electron-\ensuremath{\gamma} results, giving ${b}_{2}(605K)=1.31(28)$ and ${b}_{2}(795K)=1.20(23).$ Some mixed transitions were also analyzed. The $326K$ electron conversion ratio ${\ensuremath{\alpha}}_{326K}=14(6)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}2}$ was measured. An upper bound for the E0/E2 mixing ratio was estimated to the ${2}^{+\ensuremath{'}}\ensuremath{\rightarrow}{2}^{+}(563$ keV) transition by the $e\ensuremath{\gamma}$ interference E0/E2 method, giving ${q}_{K}^{2}(E0/E2)l~0.06.$