Deactivation rate constants and cross sections for Ar3P2 metastables in collision reactions with several molecules

Jong, H. J. De

doi:10.1016/0009-2614(74)80349-0

Cited by 25 publications

(11 citation statements)

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“…The orbiting model fits the data well at low collision energy, whereas the approach to the absorbing sphere dependence is apparent at higher energy, which is seen most clearly for Ar* quenching. As in our earlier study, the predicted rate constant value at 300 K is significantly larger than one determined directly in a flowing afterglow apparatus for Ar*( 3 P 2 ) + H 2 O …”

Section: Discussioncontrasting

confidence: 44%

“…The relative kinetic energy range studied is 0.0463−0.772 eV for Ar*( 3 P 2 ) and 0.0432−0.692 eV for Kr*( 3 P 2 ). As in our earlier study, the predicted rate constant value at 300 K (8.1 × 10 -10 cm 3 molecule -1 s -1 ) is significantly larger than one determined directly (4.8 × 10 -10 cm 3 molecule -1 s -1 ) in a flowing afterglow apparatus for Ar*( 3 P 2 ) + H 2 O …”

Section: Introductionsupporting

confidence: 54%

“…For T = 300 K, the predicted rate constants are 8.1 × 10 -10 cm 3 ·mol -1 ·s -1 for Ar* + H 2 O and 7.5 × 10 -10 cm 3 ·mol -1 ·s -1 for Kr* + H 2 O. The value for Ar* is considerably larger than the experimental one, 4.8 × 10 -10 cm 3 ·mol -1 ·s -1 . The reason for this difference is unclear.…”

Section: Discussionmentioning

confidence: 70%

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Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Mueller

Krenos

2002

J. Phys. Chem. B

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In this paper, we examine the functional nature of the state-specific cross section for electronic quenching σQ(E) in collisions of metastable noble gas atoms [Ar*(3P2) and Kr*(3P2)] with ground-state water molecules confined to a scattering-gas cell. The relative kinetic energy range studied is E = 0.0463−0.772 eV for Ar*(3P2) and 0.0432−0.692 eV for Kr*(3P2). These beam-gas-luminescence experiments incorporate a novel state-specific monitor system employing Xe gas. Photon emission from a state-specific Xe state produced in quenching collisions with the respective metastable noble gas (Ng*) atoms is a direct measure of the total disappearance of the metastable state under scrutiny in the reaction with water vapor. We use the classical orbiting and absorbing sphere models with empirically derived parameters [London dispersion C disp, induction C ind (spherically averaged or aligned dipole), and absorbing sphere radius r as] to predict energy-dependent cross sections for the total quenching reactions. The underlying premise of the models is that although the quenching process itself is envisioned to be a short-range two-electron exchange interaction, it is the long-range attractive forces between the respective collision partners that are critical in determining whether such short-range processes ultimately occur. Values of σ Q determined from the models are in very good agreement with our experiment. This work supersedes our previous study for Ar*(3P2,0) [Novicki, S.; Krenos, J. J. Chem. Phys. 1988, 89, 7031].

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Section: Discussioncontrasting

confidence: 44%

Section: Introductionsupporting

confidence: 54%

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Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Mueller

Krenos

2002

J. Phys. Chem. B

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“…For an H-mode in pure argon, the relative argon metastable state density was shown to be only dependent on T e . It is possible to consider that it is also the case for Ar-N 2 gas mixture because the rate constant for quenching by nitrogen molecule (reaction A) is not strong enough to modify the kinetic schema for the argon metastable (k A = 3.10 −11 cm 3 s −1 [57]):…”

Section: Nitrogen Dissociation and Ion Production In Pure Nitrogen Icpsmentioning

confidence: 99%

Nitrogen dissociation in a low pressure cylindrical ICP discharge studied by actinometry and mass spectrometry

Czerwiec

Greer²,

Graves³

2005

J. Phys. D: Appl. Phys.

118

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A cylindrical inductively coupled plasma source (ICPS) is optimized for nitrogen atom production. How to operate in the bright mode (H-mode) in pure nitrogen at relatively low applied power is explained. Actinometry is developed for a quantitative determination of the nitrogen dissociation fraction in the ICPS. These results are compared with those obtained outside the ICPS by modulated beam mass spectrometry. A qualitative agreement is obtained between the nitrogen dissociative fraction inside and outside the ICPS. The higher magnitude of the dissociation fraction given by mass spectrometry compared with that derived from actinometry is explained by the contribution of dissociative recombination of near the exit hole of the ICPS. A dissociation fraction of up to 0.7 is observed by mass spectrometry. Some results are also reported for argon–nitrogen gas mixtures.

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“…The quenching rate coefficient of Ar( 3 P 2 ) by Ar( 1 S 0 ) has been determined spectroscopically by many researchers [15][16][17][18][19][20] and a few papers have been published on the collisional quenching rate coefficient of Ar( 3 P 2 ) by H 2 O, i.e. Bourène and Le Calvé [21], Jong [22], Lablond et al [23] and Li et al [24]. However, the temperature dependences of the collisional quenching reaction rate coefficients of Ar( 3 P 2 ) by Ar( 1 S 0 ) and H 2 O have not been reported to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Experimental derivation of Arrhenius equations for collisional quenching rate coefficients of Ar(³P₂) by Ar(¹S₀) and H₂O

Suzuki¹

2019

J. Phys. D: Appl. Phys.

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This paper presents the temperature dependence for the collisional quenching rate coefficient of the metastable excited atom Ar(3P2) by the water molecule H2O. A few papers reported on the collisional quenching rate coefficients of the metastable excited atom Ar(3P2) by the ground state atom Ar(1S0) and the water vapor molecule (H2O) have already been published; however, their temperature dependences have not been reported. We determined them experimentally by a nonspectroscopic method following our previous works on the metastables Ne(3P2) and . The effective lifetime of Ar(3P2) was measured in Ar and Ar/H2O mixtures in a Townsend discharge by a pulsed afterglow technique. The collisional quenching rate coefficients of the metastable excited atom Ar(3P2) by Ar(1S0) and H2O were determined as 1.22 × 10−15 and 2.31 × 10−10 cm3 s−1 at 300 K, respectively. The diffusion coefficient and reflection coefficient of Ar(3P2) at a cathode surface were also determined. Furthermore, the temperature dependences of both the collisional quenching rate coefficients were investigated and expressed as Arrhenius equations. The data are expected to enable the numerical simulation of the reaction between H2O and the metastable excited atoms produced by dielectric barrier discharges and atmospheric plasma jets in air plasma.

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Deactivation rate constants and cross sections for Ar3P2 metastables in collision reactions with several molecules

Cited by 25 publications

References 1 publication

Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Nitrogen dissociation in a low pressure cylindrical ICP discharge studied by actinometry and mass spectrometry

Experimental derivation of Arrhenius equations for collisional quenching rate coefficients of Ar(³P₂) by Ar(¹S₀) and H₂O

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Deactivation rate constants and cross sections for Ar3P2 metastables in collision reactions with several molecules

Cited by 25 publications

References 1 publication

Reaction of Metastable Ar*(3P2) and Kr*(3P2) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Reaction of Metastable Ar*(3P2) and Kr*(3P2) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Nitrogen dissociation in a low pressure cylindrical ICP discharge studied by actinometry and mass spectrometry

Experimental derivation of Arrhenius equations for collisional quenching rate coefficients of Ar(3P2) by Ar(1S0) and H2O

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Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Reaction of Metastable Ar(³P₂) and Kr(³P₂) Atoms with Water Vapor: Excitation Functions for Electronic Quenching Collisions

Experimental derivation of Arrhenius equations for collisional quenching rate coefficients of Ar(³P₂) by Ar(¹S₀) and H₂O