Postcollision-interaction effects in multistep Auger transitions following Ar <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1</mml:mn><mml:mi>s</mml:mi></mml:mrow></mml:math> photoionization
نویسندگان
چکیده
Postcollision-interaction (PCI) effects involving multistep decay processes following Ar $1s$ photoionization has been studied by Auger electron spectroscopy. The experiment focused on $LMM$ electrons measured in small photon energy steps across the threshold. Decay pathways that we include (1) ${\mathrm{Ar}}^{+*}2{p}^{--1}\ensuremath{\rightarrow}{\mathrm{Ar}}^{2+}3{p}^{--2}$ LMM\ensuremath{\alpha} process due to a single $L$ hole created $KL$ fluorescence, (2) ${\mathrm{Ar}}^{2+*}2{p}^{--2}\ensuremath{\rightarrow}{\mathrm{Ar}}^{3+*}2{p}^{--1}3{p}^{--2}$ ${LMM}_{1}$ double shell states produced $KLL$ processes, and (3) subsequent ${\mathrm{Ar}}^{3+*}2{p}^{--1}3{p}^{--2}\ensuremath{\rightarrow}{\mathrm{Ar}}^{4+}3{p}^{--4}$ ${LMM}_{2}$ transitions. Particularly pronounced PCI shifts unusual line shapes compared ordinary one-step were found spectra of first step. experimental results with calculations based semiclassical approach PCI. Good agreement was between calculated shifts. result opens possibilities for further studies multielectron dynamics mediated through photoelectron these similar systems.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physreva.106.033114