Evolution of the ionic polarization in multiple sequential ionization: General equations and an illustrative example

Авторы: Gryzlova Elena V., Kiselev Maksim D., Popova Maria M., Grum-Grzhimailo Alexei N.
Журнал: Physical Review A - Atomic, Molecular, and Optical Physics
Том: 107
Год издания: 2023
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 013111(1)
Последняя страница: 013111(11)
Номер статьи: 013111
DOI: 10.1103/PhysRevA.107.013111
Аннотация: Modern free-electron lasers generate a highly intense polarized radiation which initiates a sequence of ionization and decay events. Their probability depends on the polarization of each involved state as a function of time. Its complete account is limited by the fact that a state can be formed in various ways. Here we present an equivalent of rate equations for population that completely accounts for polarization of radiation formulated in terms of statistical tensors. To illustrate our approach we theoretically consider the sequential photoionization of krypton by an intense extreme ultraviolet femtosecond pulse for photon energies below the 3d-shell excitation threshold. The calculations of the ion yields, photoelectron spectra, and ionic polarization for various photon fluences are presented and the role of the polarization is discussed.
Добавил в систему: Грызлова Елена Владимировна

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