L-Subshell Ratios of Some Low-EnergyE2Transitions

Abstract

$L$-subshell internal conversion ratios have been measured for low-energy $E2\mathrm{}$ transitions in several deformed nucle: ${\mathrm{Dy}}^{160}$ (86.74 keV), ${\mathrm{Er}}^{166}$ (80.57 keV), ${\mathrm{Tm}}^{169}$ (130.53 keV), ${\mathrm{Yb}}^{170}$ (84.23 keV), ${\mathrm{Os}}^{186}$ (137.15 keV), and ${\mathrm{Os}}^{188}$ (155.03 keV). The measurements were made with 50-cm radius, double focusing spectrometers at momentum resolutions better than 0.1%, and the ratios were determined with an accuracy of about 2%. In all but one of the six cases the $\frac{L_1}{L_3}$ ratios agree with theoretical values; however, the $\frac{L_2}{L_3}$ ratios in all cases are larger than theoretical values, with an average deviation of 6%. There is no immediately available explanation for this discrepancy.