Kαhypersatellites of Zr

The $K\alpha$ hypersatellites $K{\alpha }_1^h$ and $K{\alpha }_2^h$ of zirconium were observed in a conventional x-ray spectrum analysis. The energy separation between the hypersatellites and their corresponding diagram lines were measured, and the intensity ratio $\frac{I\left(K{\alpha }_1^h\right)}{I\left(K{\alpha }_2^h\right)}$ was computed. The experimental values are in good agreement with the results of the most advanced calculations, except for the energy of the $K{\alpha }_2^h$ where the measured value is some 15 eV higher than the theoretical prediction.