Angular Correlation betweenKandLX Rays in Pb

Angular correlations between $K$ and $L$ x rays in Pb were measured. NaI(T1) and Ge(Li) detectors were used for the detection of $K$ and $L$ x rays, respectively. The angular correlation functions for the $K-L\alpha$, $K-L\beta$, and $K-\mathrm{Ll}$ cascades were found to be $W\left(\theta \right)=1+(4.13\mathrm{}\pm 0.36)\times {10}^{-2\mathrm{}}{P}_2\left(cos\theta \right)$, $W\left(\theta \right)=1+(1.22\mathrm{}\pm 0.43)\times {10}^{-2\mathrm{}}{P}_2\left(cos\theta \right)$, and $W\left(\theta \right)=1+(23.32\mathrm{}\pm 2.06)\times {10}^{-2\mathrm{}}{P}_2\left(cos\theta \right)$, respectively. The results for the $K-L\alpha$ cascade demonstrate the contribution of magnetic quadrupole radiation to the x-ray transitions. When this contribution is taken into account, relatively good agreement with theory is obtained in all cases. Better agreement would be obtained for slightly higher (than theoretically calculated) $M_2$ contributions to the $L$ x-ray transitions.