Dissociative recombination of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ne</mml:mi><mml:mn>2</mml:mn><mml:none /><mml:none /><mml:mo>+</mml:mo></mml:mmultiscripts></mml:math>molecular ions

Ngassam, V.; Orel, A. E.

doi:10.1103/physreva.73.032720

Cited by 16 publications

(25 citation statements)

References 27 publications

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“…which are plotted in a log-log scale. The value of α at room temperature is (1.55 ± 0.15 ) x 10 −7 cm 3 s −1 which is slightly lower than values of other authors, but in very good agreement with theoretically calculated value published recently by Ngassam and Orel [23]. This difference can be caused by the shape and excitation of the d.c. glow pulsed discharge when the radial electron density distribution is not homogeneous as we have supposed during evaluation of the "average electron density".…”

Section: Measurement Of α(T E ) With Microwave S-band Apparatussupporting

confidence: 88%

The Dual Mode Microwave Afterglow Apparatus for Measuring the Electron Temperature Dependence of the Electron‐Ion Recombination

Mikuš

Morva

Morvová

et al. 2008

Contrib. Plasma Phys.

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Key words Stationary afterglow plasma, microwave diagnostics of plasma, electron heating with microwaves, dissociative recombination, electron temperature dependence of recombination, molecular neon ions. PACS 34. 80, 52.20, 52.70 Three dual mode microwave apparatus (one using S-band and two using X-band) have been developed to determine ambipolar diffusion and electron-ion recombination rates under conditions such that Tgas = 300K and Te is varied from 300 K to 6300 K, in the afterglow period of the dc glow discharge. The T M010 cylindrical cavity (in S-band) and T M011 open cylindrical cavity (X-band) are used to determine the electron density during the afterglow period and a non-resonant waveguide mode is used to apply a constant microwave heating field to the electrons. To test the properties of the apparatus the neon afterglow plasma has been investigated. At Te = 300 K a value of α(Ne (X-band) obeyed over the range 300 ≤ Te ≤ 6300K are in good agreement with some other previous measurements. The simplicity of the X-band microwave apparatus also allows the measurements of the gas temperature dependency and the study of electron attachment and may be used simultaneously with optical or mass spectrometry investigations.

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Section: Measurement Of α(T E ) With Microwave S-band Apparatussupporting

confidence: 88%

The Dual Mode Microwave Afterglow Apparatus for Measuring the Electron Temperature Dependence of the Electron‐Ion Recombination

Mikuš

Morva

Morvová

et al. 2008

Contrib. Plasma Phys.

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“…Особый интерес эти данные представляют для прогнозирования свойств активных сред на плазме с молекулярными ионами [25]. Они также могут использоваться в качестве реперных дынных для тестирования теоретических моделей (например, [26,27]), претендующих на адекватное распределения потока рекомбинации по выходным каналам процесса.…”

Section: обсуждение результатовunclassified

Диссоциативная рекомбинация в послесвечении барьерного разряда в неоне низкого давления. Заселение атомов конфигурации 2p-=SUP=-5-=/SUP=-3d

Иванов¹

2021

Оптика И Спектроскопия

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The decaying neon plasma produced by the dielectric barrier discharge (DBD) in a cylindrical tube at a pressure of 0.1–40 Torr has been spectroscopically investigated to analyze the dissociative recombination (DR) of molecular ions with electrons as a mechanism for the formation of excited atoms. It is shown that, at the electron density in the afterglow less than 5•1010 cm-3 the DR is the dominant source of population of 3d levels at pressures PNe ≥ 0.6 Torr. At lower pressures, the optical properties of the decaying plasma are formed to a greater extent by the collisional-radiative recombination of Ne+ ions. A significant variation of the relative intensities of the 3d -> 3p transition lines in the afterglow with a change in gas pressure was found, reflecting the effect of inelastic collisions on the formation of the spectrum of decaying plasma in the near infrared region. From measurements carried out at a pressure of 0.6 Torr, the relative values of the partial DR coefficients for the 3dj levels of the neon atom were found. Comparison of these data with measurements in the near ultraviolet region, containing the lines of 4p -> 3s transitions, indicates the need to take into account the cascade 4p -> 3d transitions to correctly solve the problem of the final products of dissociative recombination.

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“…Кинетика населенностей колебательных уровней молекулярных ионов в плазме инертных газов до сих пор в экспериментальном плане остается практически не исследованной. Теоретические расчеты [40] предсказывают возможность рекомбинации колебательно-возбужденных ионов с константами скорости масштаба (2−10) • 10 −7 cm 3 /s. Учитывая, что в процессе конверсии атомных ионов (4), появляющихся в послесвечении в парных столкновениях (6), образуются колебательно-возбужденные молекулярные ионы, можно предположить наличие потока ДР на высоковозбужденные уровни атома неона, в том числе и на 4d и 5d.…”

Section: высокие давленияunclassified

Диссоциативная рекомбинация молекулярных ионов Ne-=SUB=-2-=/SUB=--=SUP=-+-=/SUP=- с электронами. Заселение атомов конфигурации 2p-=SUP=-5-=/SUP=-4p в распадающейся плазме

Гордеев¹,

Ivanov²,

Скобло³

2019

Журнал Технической Физики

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The paper presents the results of the study of decaying neon plasma by the method of kinetic spectroscopy. Experimental conditions: neon pressure 0.2–152 Torr, electron density in the initial stage of decay [e] ≤ 5 × 1010 cm-3. The plasma was created by a pulsed barrier discharge with electrodes on the outer surface of a cylindrical glass tube. Discharge frequency 40–160 Hz. On the basis of a comparative analysis of the dependences of the intensities of spectral lines on the time and temperature of electrons in the afterglow, it was shown that in terms of the mechanisms of population, the levels of 2p54p are clearly divided into two groups. Lower levels: from 3p10 to 3p3 (Paschen notation) are associated with the dissociative recombination of molecular ions with electrons and, up to pressures of 0.6 Torr, the lines emitted by them behave identically to the lines of 2p53s ← 2p53p and 2p53p ← 2p53d transitions. The behavior of the upper levels (3p5, 3p2, 3p4, and 3p1) was more complex, and at low pressures, the populations of all 2p54p levels turned out to be related to the impact-radiation recombination of Ne + ions. Significant differences in the dependences of the relative populations of 3d and 4p levels on the neon pressure are discussed.

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Dissociative recombination ofNe2+molecular ions

Cited by 16 publications

References 27 publications

The Dual Mode Microwave Afterglow Apparatus for Measuring the Electron Temperature Dependence of the Electron‐Ion Recombination

The Dual Mode Microwave Afterglow Apparatus for Measuring the Electron Temperature Dependence of the Electron‐Ion Recombination

Диссоциативная рекомбинация в послесвечении барьерного разряда в неоне низкого давления. Заселение атомов конфигурации 2p-=SUP=-5-=/SUP=-3d

Диссоциативная рекомбинация молекулярных ионов Ne-=SUB=-2-=/SUB=--=SUP=-+-=/SUP=- с электронами. Заселение атомов конфигурации 2p-=SUP=-5-=/SUP=-4p в распадающейся плазме

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