Influence of the alloying effect on nickel K-shell fluorescence yield in Ni–Si alloys

Alloying effects on the K-shell fluorescence yield ωK of nickel in Ni–Si binary alloy system have been studied by energy dispersive X-ray fluorescence. It is found that ωK increases from pure Ni to Ni2Si and then decreases from Ni2Si to NiSi. These results are discussed in terms of d-occupation number on the Ni site and it is concluded that electronic configuration as a result of p-d hybridization explain qualitatively the observed variation of ωK in Ni–Si alloys.