Faculté des sciences

Khα1,2 X-ray hypersatellite line broadening as a signature of K-shell double photoionization followed by outer-shell ionization and excitation

Polasik, M. ; Słabkowska, K. ; Rzadkiewicz, J. ; Kozioł, K. ; Starosta, J. ; Wiatrowska-Kozioł, E. ; Dousse, Jean-Claude ; Hoszowska, Joanna

In: Physical Review Letters, 2011, vol. 107, no. 7, p. 073001

We propose a novel approach for the theoretical analysis of the photoinduced high-resolution Khα1,2 x-ray hypersatellite spectra, which allows us to obtain reliable values of lifetimes of the doubly K-shell ionized states and fundamental information about the relative role of K-shell double photoionization (DPI) mechanisms. It is demonstrated for the first time that the... Plus

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    Summary
    We propose a novel approach for the theoretical analysis of the photoinduced high-resolution Khα1,2 x-ray hypersatellite spectra, which allows us to obtain reliable values of lifetimes of the doubly K-shell ionized states and fundamental information about the relative role of K-shell double photoionization (DPI) mechanisms. It is demonstrated for the first time that the Khα1,2 hypersatellite natural line broadening observed for selected metal atoms with 20≤Z≤30 can be well reproduced quantitatively by taking into account the influences of the open-shell valence configuration (adopted from predictions of the band-structure method) and the outer-shell ionization and excitation following the DPI process.