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Low-Pressure Barrier Discharge Spectroscopy. Afterglow with Ne Ne+2, Ne+, and Ne2+ Ions. / Ivanov, V. A.
в: OPTICS AND SPECTROSCOPY, 26.12.2021.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Low-Pressure Barrier Discharge Spectroscopy. Afterglow with Ne Ne+2, Ne+, and Ne2+ Ions
AU - Ivanov, V. A.
N1 - Publisher Copyright: © 2021, Pleiades Publishing, Ltd.
PY - 2021/12/26
Y1 - 2021/12/26
N2 - Abstract: The radiation of decaying plasma formed by electron–ion recombination processes involving three neon ions: the molecular ion Ne$$_{2}^{ + }$$ and the atomic ions Ne+ and Ne2+ has been simulated. Such a combination of ions simultaneously involved in the formation of the plasma spectrum was first detected in the afterglow of a pulsed barrier discharge of a cylindrical configuration at neon pressures of less than 1 Torr and electron densities of less than 4 × 1010 cm–3. The main attention has been paid to the comparative analysis of the mechanisms of collisional radiative recombination of the Ne+ and Ne2+ ions based on the numerical solution of the system of differential equations for the densities of the ions and long-lived excited atoms in the afterglow considering the basic elementary processes in a decaying plasma with pulsed “heating” of electrons. The regularities of the relaxation of the electron temperature from the discharge values of several electron volts to 300 K in the late afterglow have been considered in detail. A comparison of the simulated solutions with the results of the measurements of the spectral line intensities by the multichannel photon counting method shows that, at their good agreement in the case of single-charge ions, an adequate description of the evolution of ion lines requires expanding the available data on the recombination of Ne2+ ions.
AB - Abstract: The radiation of decaying plasma formed by electron–ion recombination processes involving three neon ions: the molecular ion Ne$$_{2}^{ + }$$ and the atomic ions Ne+ and Ne2+ has been simulated. Such a combination of ions simultaneously involved in the formation of the plasma spectrum was first detected in the afterglow of a pulsed barrier discharge of a cylindrical configuration at neon pressures of less than 1 Torr and electron densities of less than 4 × 1010 cm–3. The main attention has been paid to the comparative analysis of the mechanisms of collisional radiative recombination of the Ne+ and Ne2+ ions based on the numerical solution of the system of differential equations for the densities of the ions and long-lived excited atoms in the afterglow considering the basic elementary processes in a decaying plasma with pulsed “heating” of electrons. The regularities of the relaxation of the electron temperature from the discharge values of several electron volts to 300 K in the late afterglow have been considered in detail. A comparison of the simulated solutions with the results of the measurements of the spectral line intensities by the multichannel photon counting method shows that, at their good agreement in the case of single-charge ions, an adequate description of the evolution of ion lines requires expanding the available data on the recombination of Ne2+ ions.
KW - collisional radiative recombination
KW - decaying plasma
KW - dielectric barrier discharge
KW - doubly charged ions
KW - elementary processes
KW - rate constant
UR - http://www.scopus.com/inward/record.url?scp=85121660004&partnerID=8YFLogxK
U2 - 10.1134/S0030400X21080099
DO - 10.1134/S0030400X21080099
M3 - Article
AN - SCOPUS:85121660004
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
ER -
ID: 93688645