Multiple Sequential Ionization of Valence n = 4 Shell of Krypton by Intense Femtosecond XUV Pulses

Sequential photoionization of krypton by intense extreme ultraviolet femtosecond pulses is studied theoretically for the photon energies below the 3d excitation threshold. This regime with energetically forbidden Auger decay is characterized by special features, such as time scaling of the level pop...

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Bibliographic Details
Published inAtoms Vol. 8; no. 4; p. 80
Main Authors Gryzlova, Elena V., Kiselev, Maksim D., Popova, Maria M., Zubekhin, Anton A., Sansone, Giuseppe, Grum-Grzhimailo, Alexei N.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2020
Subjects
Atoms & subatomic particles
Augers
Energy
Femtosecond pulses
Fluence
free-electron laser
ions
Krypton
multiple ionization
Photoelectrons
Photoionization
Photons
Population
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Summary:Sequential photoionization of krypton by intense extreme ultraviolet femtosecond pulses is studied theoretically for the photon energies below the 3d excitation threshold. This regime with energetically forbidden Auger decay is characterized by special features, such as time scaling of the level population. The model is based on the solution of rate equations with photoionization cross sections of krypton in different charge and multiplet states determined using R-matrix calculations. Predictions of the ion yields and photoelectron spectra for various photon fluence are presented and discussed.
ISSN:2218-2004
2218-2004
DOI:10.3390/atoms8040080