Pulse Radiolysis Studies. XX. Kinetics of Some Addition Reactions of Gaseous Hydrogen Atoms by Fast Lyman-<i>α</i> Absorption Spectrophotometry

Hikida, T.; Eyre, J. A.; Dorfman, Leon M.

doi:10.1063/1.1675360

Cited by 67 publications

(24 citation statements)

References 18 publications

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“…It is seen that the activation energy obtained in this work is in excellent agreement with that of Clyne and Thrush (3) and that the value of k, at room temperature agrees very well with that of Hartley and Thrush (4) but is about 50% higher than the value determined recently by Hikida, Eyre, and Dorfmann (5).…”

Section: Discussionsupporting

confidence: 88%

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

Atkinson¹,

Cvetanović²

1973

Can. J. Chem.

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A modulation technique has been used to determine from phase shift measurements the absolute values of the rate constants and the Arrhenius parameters of the reaction of hydrogen atoms with nitric oxide.Une technique de modulation a ete utiliske dans la determination a partir des mesures de changement de phase, des valeurs absolues des constantes de vitesse et des parametres d'Arrh6nius dans la reaction des atomes d'hydrogene sur l'oxyde nitrique.[Traduit par le journal]Can.

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Section: Discussionsupporting

confidence: 88%

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

Atkinson¹,

Cvetanović²

1973

Can. J. Chem.

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“…However, in the studies by Bishop and Dorfman [ l l ] and Hikida, Eyre, and Dorfman [12], a static reaction cell was employed and the H atoms were produced via the electron bombardment (pulse radiolysis) of H2. The kinetic decay of the H atoms due to reaction with 0 2 was then followed by monitoring photoelectrically the absorption of Lyman-a radiation at 1216 A.…”

Section: Resultsmentioning

confidence: 99%

“…The kinetic decay of the H atoms due to reaction with 0 2 was then followed by monitoring photoelectrically the absorption of Lyman-a radiation at 1216 A. Although two values were measured in these studies, 2.06 and 1.6 X cm6/mole2-s, the preferred value for the third body Ar was 1.6 X Using H2 as the third body gas, [ l l ] and [12] reported a rate constant of 4.7 X For both Hz and Ar, therefore, the values reported by [ I l l and [12] are approximately 20% lower than those given in this study. Although this is within an assigned &12y0 uncertainty for both studies, it would appear that small systematic errors have probably gone uncorrected in one or all of the three studies being compared.…”

Section: Resultsmentioning

confidence: 99%

A flash photolysis‐resonance fluorescence study of the reaction of atomic hydrogen with molecular oxygen H + O₂ + M → HO₂ + M

Wong

Davis

1974

Int J of Chemical Kinetics

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Using the technique of flash photolysis-resonance fluorescence, absolute rate constants have been measured for the reaction H + 0 2 + M 4 HOz + M over a temperature range of 220-360°K. Over this temperature range, the data could be fit to an Arrhenius expression of the following form:The units for kAr are cm6/mole-s. At 300°K the relative efficiencies for the third-body gases Ar:He:H2:N2:CH4 were found to be 1.0:0.93:3.0:2.8:22.Wide variations in the photoflash intensity at several temperatures demonstrated that the reported rate constants were measured in the absence of other complex chemical processes.

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“…If transmittances are greater than 0.8, Beer's law holds to a good approximation. For the two sources described herc, the effect of pressure broadening is to extend to lower transmittances the region over which Beer's law is applicable, and this is advantageous in pseudo-first-order kinetic studies [31]. On the other hand, the inference of absolute concentration is more complicated.…”

Section: Discussionmentioning

confidence: 98%

Lyman‐α absorption photometry at high pressure and atom density kinetic results for H recombination

Lynch

Schwab

Michael

1976

Int J of Chemical Kinetics

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Atomic absorption and fluorescence spectrophotometry have been routinely used in kinetic investigations as probes of relative, rather than absolute, atom concentration. The calibration of a Lyman-a photometer for measurement of absolute hydrogen atom concentrations at levels [HI 1 5 1.8 X 1014 atoms/cmz and total pressure of 1.3 torr He is described. The photometer is characterized in terms of a two-level emission source and an absorption region in which only Doppler broadening of the transition is considered. The modifications due to pressure broadening by high pressures (500 5 P 6 1500 torr) in the absorption region are discussed in detail. Application of the technique is reported for the recombination of hydrogen atoms in the presence of six nonreactive heat bath gases. Experiments were performed in a static reaction cell at pressures of 500-1500 torr of heat bath gas, and hydrogen atoms were produced by HgThe technique is critically evaluated and the mechanistic implications of the hydrogen atom recombination results are examined. The measured room temperature recombination rate constants in H,, He, Ne, Ar, Kr, and N 1 are 8.3 f 1.2, 6.9 f 1.5, 5.9 =k 1.5, 8.0 f 0.8, 10.2 0.9, and 9.6 f 1.4, respectively, where the units are cm6/molecz . sec. photosensitization of HP.

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Pulse Radiolysis Studies. XX. Kinetics of Some Addition Reactions of Gaseous Hydrogen Atoms by Fast Lyman-α Absorption Spectrophotometry

Abstract: Articles you may be interested inVacuum ultraviolet absorption spectroscopy in the spectral interval of Lymanα of atomic hydrogen and deuterium in an ion source plasma Rev.

Cited by 67 publications

References 18 publications

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

A flash photolysis‐resonance fluorescence study of the reaction of atomic hydrogen with molecular oxygen H + O₂ + M → HO₂ + M

Lyman‐α absorption photometry at high pressure and atom density kinetic results for H recombination

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Pulse Radiolysis Studies. XX. Kinetics of Some Addition Reactions of Gaseous Hydrogen Atoms by Fast Lyman-α Absorption Spectrophotometry

Abstract: Articles you may be interested inVacuum ultraviolet absorption spectroscopy in the spectral interval of Lymanα of atomic hydrogen and deuterium in an ion source plasma Rev.

Cited by 67 publications

References 18 publications

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

Determination of the Rates of Hydrogen Atom Reaction with NO by a Modulation Technique

A flash photolysis‐resonance fluorescence study of the reaction of atomic hydrogen with molecular oxygen H + O2 + M → HO2 + M

Lyman‐α absorption photometry at high pressure and atom density kinetic results for H recombination

Contact Info

Product

Resources

About

A flash photolysis‐resonance fluorescence study of the reaction of atomic hydrogen with molecular oxygen H + O₂ + M → HO₂ + M