А -Е Е Е А Ы Е , Е А я варь–февра ь 2017 17№ 1 ISSN 2226-1494 http://ntv.ifmo.ru/
SCIENTIFIC AND TECHNICAL JOURNAL OF INFORMATION TECHNOLOGIES, MECHANICS AND OPTICS January–February 2017 Vol. 17 No 1 ISSN 2226-1494 http://ntv.ifmo.ru/en
537.5
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: alex_chirtsov@mail.ru
04.12.16, 30.12.16
doi: 10.17586/2226-1494-2017-17-1-159-171 –
: . ., ё . ., . .
//
- , . 2017. . 17. № 1. .159–171. doi:
10.17586/2226-1494-2017-17-1-159-171
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A CALCULATION OF SEMI-EMPIRICAL ONE-ELECTRON WAVE FUNCTIONS
FOR MULTI-ELECTRON ATOMS USED FOR ELEMENTARY PROCESS
SIMULATION IN NONLOCAL PLASMA
M.V. Tchernycheva
a, S.V. Sychov
b, A.S. Chirtsov
ba
Institut d'Electronique Fondamentale, Paris, 91405, France
b
ITMO University, Saint Petersburg, 197101, Russian Federation
Corresponding author: alex_chirtov@mail.ru
Article info
Article in Russian
For citation: Tchernycheva M.V., Sychov S.V., Chirtsov A.S. A calculation of semi-empirical one-electron wave functions for multi-electron atoms used for elementary process simulation in nonlocal plasma. Scientific and Technical Journal of Information Technologies,
Mechanics and Optics, 2017, vol. 17, no. 1, pp. 159–171. doi: 10.17586/2226-1494-2017-17-1-159-171
Abstract
Subject of Research.
The paper deals with development outcomes for creation method of one-electron wave functions of
complex atoms, relatively simple, symmetrical for all atom electrons and free from hard computations. The accuracy and
resource intensity of the approach are focused on systematic calculations of cross sections and rate constants of elementary
processes of inelastic collisions of atoms or molecules with electrons (ionization, excitation, excitation transfer, and others).
Method.
The method is based on a set of two iterative processes. At the first iteration step the Schrödinger equation was
solved numerically for the radial parts of the electron wave functions in the potential of the atomic core self-consistent field.
At the second iteration step the new approximation for the atomic core field is created that uses found solutions for all
one-electron wave functions. The solution optimization for described multiparameter problem is achieved by the use of genetic
algorithm. The suitability of the developed method was verified by comparing the calculation results with numerous data on
the energies of atoms in the ground and excited states.
Main Results
. We have created the run-time version of the program
for creation of sets of one-electron wave functions and calculation of the cross sections and constants of collisional transition
rates in the first Born approximation. The priori available information about binding energies of the electrons for any
many-particle system for creation of semi-empirical refined solutions for the one-electron wave functions can be considered at any
step of this procedure.
Practical Relevance
. The proposed solution enables a simple and rapid preparation of input data for
the numerical simulation of nonlocal gas discharge plasma. The approach is focused on the calculation of discharges in
complex gas mixtures requiring inclusion in the model of a large number of elementary collisional and radiation processes
involving heavy particles in different quantum states.
Keywords
multi-electron atoms, one-electron wave functions, self-consistent field, atomic core polarization, Born method, electron
impact ionization, electron impact excitation, optimization, genetic algorithms
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22. . . .
.: , 1963, 641 .
23. . . .: , 1967. 493 .
24. . ., . ., . .
. .: ,
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25. . .
// . 1963. . 45. . 753–756.
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А
Authors
Ч ы а Ма я В а а –
-, ,
, 91405, , Maria.Tchernycheva@ief.u-psud.fr
Maria V. Tchernycheva – Researcher of the first class, Institut d'Electronique Fondamentale, Paris, 91405, France, Maria.Tchernycheva@ief.u-psud.fr
Сы ё С В а – , ,
- , 197101, ,
sergey.v.sychev@gmail.com
Sergey V. Sychov – postgraduate, ITMO University, Saint Petersburg, 197101, Russian Federation, sergey.v.sychev@gmail.com
Ч А а С – ,
, , , - ,
197101, , alex_chirtov@mail.ru