Quantum theory of post-collision interaction in inner-shell photoionization: Final-state interaction between two continuum electrons

Armen, G. B.; Tulkki, Jukka; Åberg, T.; Crasemann, Bernd

doi:10.1103/physreva.36.5606

Cited by 146 publications

(67 citation statements)

References 14 publications

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“…When the second electron is emitted in the same direction as the first one, the well-known post-collision interaction [50][51][52][53] tends to increase the asymmetric sharing of the available energy [11]. The dividing line between the two different regimes of ejection in opposite or in the same direction is quite sharp and lies directly at the position of the sequential peaks.…”

Section: Angular Correlationsmentioning

confidence: 81%

Electron correlation in two-photon double ionization of helium from attosecond to XFEL pulses

Feist

Pazourek

Nagele

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We investigate the role of electron correlation in the two-photon double ionization of helium for ultrashort XUV pulses with durations ranging from a hundred attoseconds to a few femtoseconds. We perform time-dependent ab initio calculations for pulses with mean frequencies in the so-called "sequential" regime ( ω > 54.4 eV). Electron correlation induced by the time correlation between emission events manifests itself in the angular distribution of the ejected electrons, which strongly depends on the energy sharing between them. We show that for ultrashort pulses two-photon double ionization probabilities scale non-uniformly with pulse duration depending on the energy sharing between the electrons. Most interestingly we find evidence for an interference between direct ("nonsequential") and indirect ("sequential") double photo-ionization with intermediate shake-up states, the strength of which is controlled by the pulse duration. This observation may provide a route toward measuring the pulse duration of FEL pulses.

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Section: Angular Correlationsmentioning

confidence: 81%

Electron correlation in two-photon double ionization of helium from attosecond to XFEL pulses

Feist

Pazourek

Nagele

et al. 2009

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…In Ref. 9 it is also noted that the semiclassical theory 7,8 agrees well with the quantum theory, at least when the condition XPS տ ͱ ⌫ Auger is fulfilled. For the cases considered here this is no limitation; to exemplify, as the lifetime width is 0.118 eV for the Ar 2p ͑Ref.…”

Section: · ͑3͒mentioning

confidence: 81%

“…Our findings are rationalized by an extension of a semiclassical model for PCI in atomic photoionization. [7][8][9] Upon photoionization of a core orbital the ionized particle can undergo a radiationless decay to lower its energy. During this Auger decay a second electron is emitted from the ion, thus creating a doubly charged final state.…”

mentioning

confidence: 99%

Postcollision interaction in noble gas clusters: Observation of differences in surface and bulk line shapes

Lindblad

Fink

Bergersen

et al. 2005

The Journal of Chemical Physics

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The surface and bulk components of the x-ray photoelectron spectra of free noble gas clusters are shown to display differences in the influence of postcollision interaction between the photoelectron and the Auger electron on the spectral line shape; the bulk component is observed to be less affected than the surface and atomic parts of the spectra. A model for postcollision interaction in nonmetallic solids and clusters is also provided which takes the polarization screening into account. Core-level photoelectron spectra of Ar, Kr, and Xe have been recorded to verify the dependence of the postcollision interaction effect on the polarizability of the sample.

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“…Because of this we use values for the anharmonicities which are in line with our computational limits, but are as close as possible to the reported values; the used values are 30% to 50 % lower than those reported by Lundqvist et al [48]  u -post-collision interaction (PCI) is taken into account. The direct terms of the KramersHeisenberg formula are described using the PCI lineshapes given by Armen et al [59] while the less important cross terms (lifetime interference terms) are modeled with the lineshapes given by the Kramers-Heisenberg formula by including an average energy shift to approximate the photoelectron relaxation. These lineshapes were convoluted with a Gaussian of 80 meV full-width-half-maximum (FWHM) to account for the experimental resolution.…”

Section: Data Analysis and Resultsmentioning

confidence: 99%

New insight into the Auger decay process in O2: The coincidence perspective

Arion¹,

Püttner²,

Lupulescu³

et al. 2012

Journal of Electron Spectroscopy and Related Phenomena

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Photoelectron-Auger electron coincidence spectroscopy is a powerful tool for the investigation of Auger decay processes with different core-ionized intermediate states. In this paper we describe an investigation into the Auger decay of the O 2 molecule, with the purpose of bringing new insight into the dynamics of the core hole decay mechanism. Using a novel experimental approach to measuring such coincidence spectra we report the highest resolution Auger spectrum of O 2 recorded hitherto. In our approach, we have combined the advantages of these coincidence spectra with the high resolution and excellent signal-to-noise ratios of non-coincident Auger spectra and a state-of-the-art fit analysis. In this way we have derived information about the potential energy curves of the final states

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Quantum theory of post-collision interaction in inner-shell photoionization: Final-state interaction between two continuum electrons

Cited by 146 publications

References 14 publications

Electron correlation in two-photon double ionization of helium from attosecond to XFEL pulses

Electron correlation in two-photon double ionization of helium from attosecond to XFEL pulses

Postcollision interaction in noble gas clusters: Observation of differences in surface and bulk line shapes

New insight into the Auger decay process in O2: The coincidence perspective

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