Journal ArticleDOI
Asymptotic Double-Photoexcitation Cross Sections of the Helium Atom
TLDR
In this paper, a relative cross section for simultaneous excitation and ionization of the helium atom is derived from the sudden approximation, which is shown to agree with that obtained from the velocity form of the cross section in the Coulomb approximation.Abstract:
A relative cross section for simultaneous excitation and ionization of the helium atom is derived from the sudden approximation. It is shown to agree with that obtained from the velocity form of the cross section in the Coulomb approximation. It is connected to the asymptotic cross section of Kabir and Salpeter through the cusp condition at the nucleus. An analysis of the influence of ground-state correlations on the asymptotic double-excitation cross section is carried out.read more
Citations
More filters
Book ChapterDOI
Correlation Effects in the Ionization of Molecules: Breakdown of the Molecular Orbital Picture
Journal ArticleDOI
Recoil-ion momentum spectroscopy
Joachim Ullrich,R. Moshammer,Reinhard Dörner,Ottmar Jagutzki,V. Mergel,Horst Schmidt-Böcking,Lutz Spielberger +6 more
TL;DR: In this article, high-resolution recoil-ion momentum spectroscopy (RIMS) is used to determine the charge state and the complete final momentum vector of a recoiling target ion emerging from an ionizing collision of an atom with any kind of radiation.
Journal ArticleDOI
Photoionization of atoms using synchrotron radiation
TL;DR: A comprehensive review of photoionization of rare gas atoms using monochromatized synchrotron radiation is given in this paper, with a focus on the general experimental and theoretical background.
Journal ArticleDOI
Theory of core‐level photoemission correlation state spectra
R. L. Martin,D. A. Shirley +1 more
TL;DR: In this article, a theoretical framework for calculating satellite spectra is given for calculating the satellite intensities in molecular x-ray photoelectron spectra that accompany core-level photoemission peaks.
Journal ArticleDOI
Electron- and photon-impact atomic ionisation
Igor Bray,Dmitry V. Fursa,Alisher Kadyrov,Andris T. Stelbovics,Anatoli Kheifets,A. M. Mukhamedzhanov +5 more
TL;DR: In this paper, the authors report on the computational progress in the field of fully kinematically resolved atomic electron-impact ionisation, and its closely related field of double photoionisation, which has resulted in a deeper understanding of the formalism of Coulomb few-body problems.
References
More filters
Journal ArticleDOI
Spectral Distribution of Atomic Oscillator Strengths
TL;DR: In this paper, the spectrum of oscillator strength for neutral atoms in their ground states is surveyed with particular regard to recent progress in the far uv-soft x-ray range and to the theoretical interpretation of data from experiments and from numerical calculations.
Journal ArticleDOI
Ground state of the helium atom
TL;DR: In this article, the energy level of the ground state of atomic helium is restudied in detail using linear combinations of up to 39 terms and the precision of the variation result is estimated by the evaluation of lower bounds to the ground states energy.
Journal ArticleDOI
Double Electron Ejection Resulting from Photo-Ionization in the Outermost Shell of He, Ne, and Ar, and Its Relationship to Electron Correlation
Journal ArticleDOI
Multiple ionization processes in helium
FW Byron Jr.,Charles Joachain +1 more
TL;DR: In this article, double-ionization processes in helium by photon and electron impact are analyzed, and it is shown that the inclusion of atomic correlation is very important, and the leading term of the cross section is evaluated, and comparison is made with the presently available experiments.