K−Lx-ray angular correlations in Cm, Pu, and Eu

Angular correlations between $K$ and $L$ x rays in ${}_{}{}^{245}{}_{}{}^{}\mathrm{Cm}$, ${}_{}{}^{239}{}_{}{}^{}\mathrm{Pu}$, and ${}_{}{}^{153}{}_{}{}^{}\mathrm{Eu}$ were measured. The x rays of Cm, Pu, and Eu were obtained from radioactive sources of 352-yr ${}_{}{}^{249}{}_{}{}^{}\mathrm{Cf}$, 32-yr ${}_{}{}^{243}{}_{}{}^{}\mathrm{Cm}$, and 242-day ${}_{}{}^{153}{}_{}{}^{}\mathrm{Gd}$, respectively. The $K$ x rays were detected with a cooled Ge(Li) spectrometer with energy resolution of 500-eV full width at half-maximum (FWHM) at 122 keV. The $L$ x rays were detected with a cooled Si(Li) spectrometer with energy resolution of 170 eV (FWHM) at 5.9 keV. Several corrections to the angular-correlation coefficients were made including a correction for the presence of silicon x-ray escape peaks. The corrected angular-correlation coefficients are: