Decay of 39-dayRu103and 17-dayPd103to the levels ofRh103

Abstract

The levels in $^{103}\mathrm{Rh}$ have been studied by following the $\ensuremath{\gamma}$ rays and \ifmmode\times\else\texttimes\fi{} rays emitted in the decay of 39.35-day $^{103}\mathrm{Ru}$ and 17.5-day $^{103}\mathrm{Pd}$. Several new $\ensuremath{\gamma}$ rays have been detected with an anti-Compton spectrometer which allow the assignment of a new level and improved spin assignments. Conversion coefficients for most transitions following the decay of $^{103}\mathrm{Ru}$ have been calculated using the $\ensuremath{\gamma}$-ray intensity values of this work and literature values for the relative intensities of conversion electrons. The conversion coefficient for the 53-keV transition was also determined via the x-ray to $\ensuremath{\gamma}$-ray coincidence method corrected for the $557\ensuremath{\gamma}$-$53\ensuremath{\gamma}$ angular correlation. The weighted average of both measurements yields the recommended value of ${\ensuremath{\alpha}}_{K}(53)=1.95\ifmmode\pm\else\textpm\fi{}0.13$ which corresponds to an $M1+(2.1\ifmmode\pm\else\textpm\fi{}2.0)%$ $E2$ transition. $B(M1)$ and $B(E2)$ values of (0.040 \ifmmode\pm\else\textpm\fi{} 0.001) and (213 \ifmmode\pm\else\textpm\fi{} 76) Weisskopf units, respectively, have been obtained for the 53-keV transition.RADIOACTIVITY $^{103}\mathrm{Ru}$ [from $^{102}\mathrm{Ru}(n,\ensuremath{\gamma})$], $^{103}\mathrm{Pd}$ [from $^{102}\mathrm{Pd}(n,\ensuremath{\gamma})$]; measured ${E}_{\ensuremath{\gamma}}$ ${I}_{\ensuremath{\gamma}}$, ${I}_{x}$, $x\ensuremath{-}\ensuremath{\gamma}$; deduced $^{103}\mathrm{Rh}$ levels, $log\mathrm{ft}$, $J$, $\ensuremath{\pi}$, ICC, $\ensuremath{\delta}$, $B(E2)$, and $B(M1)$ values. Enriched targets, Ge(Li) and Si(Li) detector, anti-Compton spectrometer.