Journal ArticleDOI
Dynamic polarizabilities of open-shell systems by coupled Hartree-Fock perturbation theory
G. P. Arrighini,Carla Guidotti +1 more
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In this article, a computational scheme for frequency-dependent polarizabilities of open-shell systems by coupled Hartree-Fock perturbation theory is presented, which allows the simultaneous approximate prediction of the involved electronic transition energies and can trivially be extended to imaginary values of the frequency.Abstract:
A computational scheme for frequency-dependent polarizabilities of open-shell systems by coupled Hartree-Fock perturbation theory is presented. It allows the simultaneous approximate prediction of the involved electronic transition energies and can trivially be extended to imaginary values of the frequency. As a simple application, the dipole polarizability and some related properties of Li atoms are evaluated, the agreement with previous estimates being excellent.read more
Citations
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Journal ArticleDOI
Self-consistent perturbation theory: Open-shell states in perturbation-dependent non-orthogonal basis sets This work was partly supported by the Institute of Low Temperatures and Structure Research of the Polish Academy of Sciences under contract No. MR-I.9.4.3/2.
TL;DR: In this paper, the perturbation equations of the self-consistent density matrix perturbations theory were derived for open-shell configurations in the restricted Hartree-Fock approximation.
Journal ArticleDOI
Accurate lifetime measurements of the lowest /sup 2/P/sub 1/2/ states in neutral lithium and sodium
A. Gaupp,P. Kuske,H.J. Andrä +2 more
TL;DR: By observing the decay in flight of laser-excited atoms in a fast atomic beam with energy between 60 and 150 keV, the lifetimes of the Li 2/sup 2/P/sub 1/2/ and Na 3/sup 1/1/2 ) were measured to be (27.29 +- 0.04) and (16.40 + − 0.03) nsec, respectively.
Book
Bibliography on Atomic Transition Probabilities: 1914 Through October 1977
TL;DR: A revised and updated annotated bibliography on atomic transition probabilities covering the literature from 1914 through October 1977 is presented and is divided into four main sections, with each article assigned a number.
Journal ArticleDOI
Progress on high precision calculations for the ground state of atomic lithium
TL;DR: In this article, the ground state of the lithium atom has been studied for high precision calculations and the following properties are considered: upper and lower bounds to the nonrelativistic ground state energy, the specific mass shift, the transition isotope shift, relativistic corrections to the ground states energy, Lamb shift, ionization potential, electron affinity, hyperfine coupling constant, the nuclear magnetic shielding constant, diamagnetic susceptibility, several polarizability factors, shielding constants, oscillator strength sums, the electron density and spin density, intracule functions, moments �
Journal ArticleDOI
Static Dipole Polarizability of Atoms and Ions in the Thomas-Fermi Model
V P Shevelko,A V Vinogradov +1 more
TL;DR: In this article, a statistical theory of the dipole polarizability α for atoms and ions, described in the Thomas-Fermi model, is given for multiply-charged ions.
References
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Journal ArticleDOI
Self-Consistent Field Theory for Open Shells of Electronic Systems
Journal ArticleDOI
Aspects of Time-Dependent Perturbation Theory
TL;DR: In this paper, it is shown that an appropriate over-all multiplicative, time-dependent normalization and phase factor can be obtained, and that it is simply the amplitude for finding the system in the unperturbed eigenstate at any time $t$.
Journal ArticleDOI
Approximations to Hartree—Fock Perturbation Theory
TL;DR: In this paper, a detailed examination of several approximations to the first-order Hartree-Fock perturbation equation is made, including coupled and uncoupled methods.
Book ChapterDOI
The Calculation of Van Der Waals Interactions
A. Dalgarno,W.D. Davison +1 more
TL;DR: In this paper, a Hartree-Fock approximation scheme for calculating the effects of a perturbation on a two-center system can be developed without difficulty, but it leads to two-electron twocenter equations, and no properly quantitative application of it has been carried out.
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