X-ray K-absorption edge of nickel in some of its compounds

Abstract

The chemical shift in the X-ray K absorption edge of nickel in a number of its compounds has been measured using a focusing spectrograph of the transmission (Cauchois) type employing a mica crystal bent to a radius of curvature of 40 cm. In all the compounds investigated, the absorption discontinuity is found to shift towards the high energy side with respect to the pure metal. These shifts have been measured and the charge on nickel atom in these compounds has been calculated.