Journal ArticleDOI
Approximated dynamical symmetry of two-electron atoms
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In this paper, the eigenstates of a new set of approximate constants of the motion of two-electron atoms are very nearly those obtained by diagnolizing 1/r ij within a complex.About:
This article is published in Chemical Physics Letters.The article was published on 1973-12-01. It has received 96 citations till now.read more
Citations
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Journal ArticleDOI
An algebraic approach to the study of the vibrational spectra of HCN
TL;DR: Using Lie algebra, the vibrational energy levels of HCN were calculated using the local Hamiltonian for 35 vibrational bands as mentioned in this paper, and a comparative study was made with earlier results.
Journal ArticleDOI
Rotor-like spectra for some doubly excited two-electron states
TL;DR: In this article, the authors consider whether strongly correlated electron motion in doubly excited two-electron atoms can be described as collective rotational behaviour similar to that known in nuclear-shell theory.
Journal ArticleDOI
Calculations of double-excited states in He, N5+ and N3+ using B-splines
TL;DR: In this paper, a direct diagonalization method in a B-spline basis was proposed for doubly-excited states using a direct di erent diagonalization technique. But the results were not extended to quasi-bound states outside a closed core and the influence of the core on the composition of 3l3l' states is studied.
Journal ArticleDOI
Spatial correlation of atomic electrons: He
TL;DR: In this article, the angular dependence of two-electron wave functions is analyzed in terms of the resulting three-coordinate function, with specific application to a number of wave functions for doubly-excited helium atoms.
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.
References
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Journal ArticleDOI
On a screening theory of atomic spectra
TL;DR: In this article, a theoretical scheme for describing atomic spectra is developed, which differs from the current one in three main ways: (i) the nuclear charge Z enters explicitly into all predictions made with the new scheme, and (ii) certain effects of configuration interaction are allowed for in the first approximation.
Journal ArticleDOI
Classification of Two-Electron Excitation Levels of Helium
J. Cooper,Ugo Fano,F. Prats +2 more
TL;DR: In this article, a classification of the states that produce the autoionizing lines observed in spectra of He is considered, and properties of these states are discussed. (D.C.W.)
Journal ArticleDOI
Wigner Coefficients for the R4 Group and Some Applications
TL;DR: In this article, the R4 spherical harmonics and their properties are obtained as specializations of the general formulas, and their physical application to the problem of geometrizing the Coulomb field is briefly discussed.
Journal ArticleDOI
Close-Coupling Calculations of Electron-Impact Excitation of the 2s State and Autoionization Below the n=3 Level in He +
Journal ArticleDOI
A simple O(4,2) approximation of hydrogenic coulomb integrals
Carl E. Wulfman,Sukeyuki Kumei +1 more
TL;DR: In this article, Coulomb integrals for electrons with hydrogenic wavefunctions are expressed in terms of operations of the Lie algebra of the group O(4,2) × O( 4,2).
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