Download a PDF: 2Mb

Monte Carlo calculation of ion, electron, and photon spectra of xenon atoms in xray freeelectron laser pulses
SangKil Son and Robin Santra
Phys. Rev. A 85, 063415 (2012) [BibTeX][pdf]doi:10.1103/PhysRevA.85.063415
When atoms and molecules are irradiated by an xray freeelectron laser (XFEL), they are highly ionized via a sequence of onephoton ionization and relaxation processes. To describe the ionization dynamics during XFEL pulses, a rate equation model has been employed. Even though this model is straightforward for the case of light atoms, it generates a huge number of coupled rate equations for heavy atoms like xenon, which are not trivial to solve directly. Here, we employ the Monte Carlo method to address this problem and we investigate ionization dynamics of xenon atoms induced by XFEL pulses at a photon energy of 4500 eV. Chargestate distributions, photoelectron and Auger electron spectra, and fluorescence spectra are presented for xray fluences of up to 10^{13} photons/μm^{2}. With the photon energy of 4500 eV, xenon atoms can be ionized up to +44 through multiphoton absorption characterized by sequential onephoton singleelectron interactions. Tags: Xe,
ionization dynamics,
Auger,
fluorescence,
chargestate,
MonteCarlo,
XATOM,
XFEL,
CFEL,
DESY
