Double Auger effect in the multiparticle perturbation theory framework

1989 ◽  
Vol 32 (7) ◽  
pp. 572-576 ◽  
Author(s):  
V. A. Kilin ◽  
I. S. Li
Keyword(s):  
Perturbation Theory ◽  
Auger Effect ◽  
Theory Framework

PROBABILITY OF AUTO-IONIZATION IN LIGHT ATOMS

1950 ◽  
Vol 28a (5) ◽  
pp. 542-548 ◽  
Author(s):  
Ta-You Wu ◽  
Lorraine Ourom
Keyword(s):  
Perturbation Theory ◽  
Transition Probability ◽  
Initial Approximation ◽  
Wave Functions ◽  
Spectral Lines ◽  
Electron Interaction ◽  
Present Calculation ◽  
Continuous State ◽  
Light Atoms ◽  
Auger Effect

With a view to testing the adequacy of the perturbation theory as applied to radiationless transitions in light atoms, the probability of such a transition in the Be atom from the 1s22p3s3P state to the continuum 1s22s + ejected p electron has been calculated. The wave functions employed for the discrete states are obtained by the variational method and the wave function for the continuous state by numerical integration of the Schrodinger equation. The transition probability obtained is 5 × 1013 per second, leading to a width of ~ 290 cm.−1 for the level 1s22p3s3P. This is at least 103 times larger than what is indicated by the observed widths of the spectral lines. Thus the present calculation, together with similar earlier calculations for the He atom, shows that the perturbation theory is inadequate for the light atoms.It is also pointed out that there is an inconsistency in the use of the perturbation theory in these calculations and those on the Auger effect in the literature since the use of variational or "screened" wave functions implies that a part of the electron–electron interaction has already been included in the initial approximation, and it is hence incorrect to treat this whole interaction as the perturbation causing the transition.

A Perturbation Theory for the Population of Atomic Energy Levels in Non-Lte Plasmas

1988 ◽  
Vol 102 ◽  
pp. 343-347
Author(s):  
M. Klapisch
Keyword(s):  
Perturbation Theory ◽  
Small Parameter ◽  
Classification Scheme ◽  
Sum Rules ◽  
Energy Levels ◽  
Natural Classification ◽  
Quantum Numbers ◽  
Formal Expansion ◽  
Atomic Energy Levels ◽  
As Effects

AbstractA formal expansion of the CRM in powers of a small parameter is presented. The terms of the expansion are products of matrices. Inverses are interpreted as effects of cascades.It will be shown that this allows for the separation of the different contributions to the populations, thus providing a natural classification scheme for processes involving atoms in plasmas. Sum rules can be formulated, allowing the population of the levels, in some simple cases, to be related in a transparent way to the quantum numbers.

The Auger effect in biology and medicine

2012 ◽  
Vol 51 (05) ◽  
pp. 161-162 ◽  
Author(s):  
L. E. Feinendegen
Keyword(s):  
Auger Effect

Energy, Information, and Superluminal Speed in Quantum Electrodynamics

2020 ◽  
pp. 27-33
Author(s):  
Boris A. Veklenko
Keyword(s):  
Electromagnetic Field ◽  
Perturbation Theory ◽  
Quantum Electrodynamics ◽  
Excited Atom ◽  
Standard Quantum ◽  
Energy Information

Without using the perturbation theory, the article demonstrates a possibility of superluminal information-carrying signals in standard quantum electrodynamics using the example of scattering of quantum electromagnetic field by an excited atom.

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