X-ray emission from layered media irradiated by an x-ray free-electron laser

Olivier Peyrusse (1) , P. Jonnard (2) , K. Le Guen (3) , J.-M André (3)

1 PIIM - Physique des interactions ioniques et moléculaires
2 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement
3 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement

This article presents a computational study of the x-ray fluorescence induced by the irradiation of thin layered media by intense, short x-ray pulses. The treatment is based on a numerical solution of the Helmholtz wave-equation both for the pump and for the fluorescence signal. Consistently with a possible heating of the medium during the x-ray pulse, complex refractive indices are calculated at each time step from the results of an underlying treatment of atomic physics. In the context of an important core-hole production as a result of photoionization, we discuss the peculiarities of the resulting amplified fluorescence grazing emission and of the Bragg diffraction which can be realized at some angles inside a multilayer material or even in a perfect crystal. * Electronic address: [e-mail]

Domaines: Physique Atomique [physics.atom-ph]; Optique [physics.optics]; Physique des plasmas [physics.plasm-ph]

Olivier Peyrusse, P. Jonnard, K. Le Guen, J.-M André. X-ray emission from layered media irradiated by an x-ray free-electron laser. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2020. ⟨hal-02458070⟩