Open Access
Photoionization cross sections for atomic chlorine using an open-shell random-phase approximation
Anthony F. Starace,Lloyd Armstrong +1 more
- pp 1179
TLDR
In this paper, the use of the Random Phase Approximation with Exchange (RPAE) for calculating partial and total photoionization cross sections and photoelectron angular distributions for open shell atoms is examined for atomic chlorine.Abstract:
The use of the Random Phase Approximation with Exchange (RPAE) for calculating partial and total photoionization cross sections and photoelectron angular distributions for open shell atoms is examined for atomic chlorine. Whereas the RPAE corrections in argon (Z=18) are large, it is found that those in chlorine (Z=17) are much smaller due to geometric factors. Hartree-Fock calculations with and without core relaxation are also presented. Sizable deviations from the close coupling results of Conneely are also found.read more
Citations
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Journal ArticleDOI
Relativistic Random-Phase Approximation
TL;DR: The relativistic random phase approximation (RRPA) as discussed by the authors was developed from linearized time-dependent Hartree-Fock theory and applied to determine excitation energies and oscillator strengths along the He, Be, Mg, Zn and Ne isoelectronic sequences.
Book ChapterDOI
Breakdown of one-electron pictures in photoelectron spectra
TL;DR: In this paper, a review of the effects of many-electron interactions in certain core levels in heavy atoms, as well as an overview of closely related phenomena in molecules, solids and adsorbates, is presented.
Book ChapterDOI
Elementary attachment and detachment processes. I
R. Stephen Berry,Sydney Leach +1 more
TL;DR: In this article, the authors present a description of the elementary collision processes associated with the production and capture of free charged particles in gases at thermal energies, up to a few electron volts, apart from photoionization that only commences with photons of several volts.
Book ChapterDOI
Atomic Photoelectron Spectroscopy. II
TL;DR: A comprehensive overview of the atomic photoelectron spectroscopy can be found in this article, with a focus on the physical implications of each approximation to allow an approximate prior assessment of how well a given calculation would do in a particular situation.
Journal ArticleDOI
Trends in the theory of atomic photoionization
TL;DR: Detailed theoretical understanding of the photoionization process has been achieved for a single electron ionized from one of the outer subshells of a closed-shell atom for VUV photon energies.
References
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Journal ArticleDOI
Effects of Configuration Interaction on Intensities and Phase Shifts
TL;DR: In this paper, a theoretical analysis of the shape of the 2s2p^{1}P resonance of He observed in the inelastic scattering of electrons is presented. But the analysis is restricted to the case of one discrete level with two or more continua and of a set of discrete levels with one continuum.
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
Equations-of-Motion Method and the Extended Shell Model
TL;DR: The equations-of-motion method is used in this paper to derive the random phase approximation (RPA) and the quasi-particle RPA (QRPA), and a higher RPA and QRPA are then derived to include these terms.
Journal ArticleDOI
Photoionization of the Noble Gases: Cross Sections and Angular Distributions
Journal ArticleDOI
R-matrix theory of photoionization. Application to neon and argon
P G Burke,K T Taylor +1 more
TL;DR: In this paper, the R-matrix method was used to calculate electron-atom and ion collision cross sections and atomic polarizabilities to enable atomic photoionization processes to be studied.