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Registration Number

0220U101782, 0119U102495 , R & D reports

Title

Dynamics of formation of the atomic and ionic excited states in the metal-vapor plasma: mechanisms of elementary processes

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Head

Roman Viktoria I., Кандидат фізико-математичних наук

Registration Date

24-02-2020

Organization

Institute of Electron Physics, Ukrainian NAS

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Annotation ATOM, AUTOIONIZATION, EXCITATION, IONIZATION, EFFECTIVE CROSS-SECTION, CORRELATION EFFECTS. Objects of research is the processes of formation and decay of the autoionization states of a rubidium atom, the phenomena of resonant excitation and the correlation effects that accompany these processes. Purpose of the work: investigation of the role of correlation effects in the course of elementary processes in pair collisions of electrons and atoms of alkali metals occurring in plasma media with impurities of metal vapor, obtaining energy and dynamic characteristics, atomic constants and modeling of the basic mechanisms of interparticle interaction. Research Methods - within the modern Flexible Atomic Code software package, distorted-wave and Borne approximations were used to obtain excitation cross sections, which take into account the relativistic nature of the excitation of complex atoms by using the Dirac-Coulomb Hamiltonian and the numerical calculation of the basis Dirac-Fock-Slater relativistic radial orbitals. The calculations were also performed in multi-configuration approximations, which allowed to establish the role of correlation effects in the calculation of excitation cross sections. The main scientific results are calculated electron excitation energies, excitation cross sections, the probability of electronic decay, and for selected AIS 4p5nl (L1S1) n'l'LSJ rubidium atoms. The analysis of the most successful incorporation of various core set of configurations for heavy rubidium atom.. The presence of a threshold resonant excitation due to the short-lived states of the negative Rb- ion is shown. Studied intensity ratio parameter R0, which made it possible to assess the reliability of experimental and theoretical data. The results obtained not only allowed us to interpret the available experimental data, also modify theoretical approaches for future calculations of the fundamental characteristics of complex electron-ion systems.

Product Description

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Pylypchynets Igor V.
Pop Oksana M.

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2020-04-02