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The absolute K-shell ionization cross sections of K and [L.sub.α] X-ray production cross sections of I by 10-30 keV electron impact have been measured. The target was prepared by evaporating a thin film of compound KI to a thick pure carbon substrate. The effects of multiple scattering of electrons penetrating the target films, electrons reflected from the thick pure carbon substrates and bremsstrahlung photons produced when incident electrons impacted on the targets were corrected by using the Monte Carlo method. For K K-shell and I L-shell X-ray characteristic peaks, the spectra were fitted using the spectrum-fitting program ALLFIT to extract the [K.sub.α] and [K.sub.β] peak counts more accurately for element K, and [L.sub.α] peak counts for element I. The experimental results were compared with some theoretical results developed recently and available experimental data from the literature. The experimental data for I L-shell X-ray production cross sections by 10-30 keV electron impact are given here for the first time. PACS Nos: 34.80.Dp, 02.70.Uu Nous avons mesure la section efficace absolue d'ionisation de la couche K de I (iode) avec production de rayons-X K et [L.sub.α], par impact d'electrons de 10-30 keV. La cible a ete preparee par evaporation d'un mince film de KI sur un substrat de carbone pur. La methode Monte Carlo nous a permis de tenir compte de la diffusion multiple des electrons penetrant le film cible, des electrons reflechis par le substrat carbone et des photons de bremsstrahlung produits lors de l'impact des electrons sur les cibles. Les pics caracteristiques des rayons-X de la couche K du K et de la couche L du I ont ete ajustees numeriquement en utilisant le logiciel ALLFIT, afin d'extraire de facon precise le nombre de coups pour les pics [K.sub.α] et [K.sub.β] de l'element K et pour les pics [L.sub.α] de l'element I. Nous avons compare nos resultats experimentaux avec des resultats theoriques recents et avec les resultats experimentaux deja dans la litterature. Nos sections efficaces experimentales pour la production de rayons-X de la couche L du I a l'aide d'impact electronique dans le domaine 10-30 keV sont les premieres a apparaitre dans la litterature. [Traduit par la Redaction], 1. Introduction The measurements of atomic inner-shell ionization cross section by electron impact are important for both fundamental studies and practical applications [1]. Although many calculation methods based on classical [...]

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