Satellite lines induced by electrons of near-threshold energy in the x-ray emission band spectra of 3d, 4d, and 5d transition metals

Philippe Jonnard (1) , I. Jarrige (1) , Christiane Bonnelle (1)

1 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement

The L$\beta_{2}$ emission band ($4d \rightarrow 2p_{3/2}$ transition) of selected transition metals of the $4d$ series (Y, Zr, Mo, and Ru) is studied under electron impact. Several spectra are recorded with electron energies as low as 15~eV above the $2p_{3/2}$ threshold. A satellite line is observed towards the high photon energy side of the normal emission. As the incident electron energy decreases and approaches the threshold energy of the emission, the intensity of the satellite line relatively to that of the normal emission line increases. The satellite has also been observed above the emission bands of $3d$ (Fe) and $5d$ (W) elements. In contrast, in the case of Ag, the above satellite line has not been observed. Thus, its existence is common to all the $nd$ elements having an open $d$ shell. The satellite is interpreted as due to a transition in an ionized atom having an additional $d$ hole in its valence band ($nd^{-2} \to n'p_{3/2} nd^{-1}$ transition).

Mots clés: x-ray emission spectroscopy; emission band; satellite line; transition metal

Domaines: Autre [cond-mat.other]

Philippe Jonnard, I. Jarrige, Christiane Bonnelle. Satellite lines induced by electrons of near-threshold energy in the x-ray emission band spectra of 3d, 4d, and 5d transition metals. 2004. ⟨hal-00002265⟩