γ-ray-induced oxidation of carbon monoxide : evidence for an ionic chain-reaction

Clay, P. G.; Johnson, George; Warman, J. M.

doi:10.1039/df9633600046

Cited by 17 publications

(11 citation statements)

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“…Essentially the same formalism, again involving COt as an intermediate, was originally proposed by Clay e t al. [4] to explain the c hain oxidation of CO also observed in the radiolysis of 02-CO mixtures. However, reactions 3 and 4 have not been detected experimentally as of this writing, and the exact mechanism for the radiation effects still remains unresolved.…”

Section: Introductionmentioning

confidence: 99%

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

Sieck¹,

Gorden²

1974

J. RES. NATL. BUR. STAN. SECT. A.

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Various mixtures co nta inin g co mbinations of CO2, O2, or CO have been photoionized at 16.7 and 21.2 eV at pressures up to 1.5 torr in the NBS high pressure photoionization mass spectrometer. In CO2-C O mixtures the interactions of CO; ion s eventually lead to the formation of (COh+ and [(CO),. C02J+ clu ster ions, while photoionization of CO2 -CO-02 mixtures yields mainly oxygen-co ntainin g clusters at higher pressures. The investigation of 0 2'CO mixtures also revealed reactions between Ot and CO. The role of impurity reactions involvin g H2 0 is consid ered in some detail , and th e im plications of all of these data to th e vapor phase radiolysis of CO2 is discussed.

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Section: Introductionmentioning

confidence: 99%

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

Sieck¹,

Gorden²

1974

J. RES. NATL. BUR. STAN. SECT. A.

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“…The mechanism proposed by Clay, Johnson, and Warman (8), although in agreement with their observations is not unique and is difficult to further substantiate by low dose rate studies. However, work at high dose rates could yield more information and it was for this purpose that the present study was undertaken.…”

Section: Introductionmentioning

confidence: 47%

“…The mechanism represented by these reactions, 7-16, is consistent with the observations. Reactions 7-13 are, of course, essentially those used by Clay, Johnson, and Warman (8), to explain the low dose rate oxidation of CO by 0,.…”

Section: Discussionmentioning

confidence: 99%

“…In their work (8), it was proposed that CO:, CO:, and 0: were all in excited states. Since we clearly have chain termination by charge neutralization we can draw no firm conclusion on this point.…”

Section: Discussionmentioning

confidence: 99%

“…Low dose rate studies of the CO-0, system have been reported by Lind and Bardwell (9), by Clay, Johnson, and Warman (8) and by Anderson, Best, and Willet (10). All agree that the yield of CO, in these systems is very high.…”

Section: Introductionmentioning

confidence: 96%

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A Positive-Ion Reaction Mechanism for the Radiation Induced Oxidation of Carbon Monoxide in the High Dose Rate Radiolysis of CO–O₂ Mixtures

Willis¹,

Boyd²,

Bindner³

1972

Can. J. Chem.

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Carbon dioxide and ozone yields have been measured in the irradiation of CO–O2 mixtures with single pulses of electrons. The yields of CO2 at 2 × 1027 ev g−1 s−1 are large G(CO2) = 15 ± 1 from 20–60% O2. These decrease by ∼50% at 1028 eV g−1 s−1. Although the results are somewhat irreproducible the addition of c-C4F8, an electron scavenger, increases these CO2 yields at both dose rates by up to a factor of 15. They are reduced to G(CO2) < 2 by the addition of positive ion scavengers. These results are consistent with a chain reaction similar to that proposed for low dose rate studies involving [Formula: see text], [Formula: see text], and [Formula: see text] as chain carriers.The ozone yields are consistent with a total oxygen atom yield of G(O) = 1.4 in pure CO from neutral processes.

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Edelgasreaktionen in der Strahlenchemie

Bünau

1965

Edelgas-Chemie

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γ-ray-induced oxidation of carbon monoxide : evidence for an ionic chain-reaction

Cited by 17 publications

References 1 publication

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

A Positive-Ion Reaction Mechanism for the Radiation Induced Oxidation of Carbon Monoxide in the High Dose Rate Radiolysis of CO–O₂ Mixtures

Edelgasreaktionen in der Strahlenchemie

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γ-ray-induced oxidation of carbon monoxide : evidence for an ionic chain-reaction

Cited by 17 publications

References 1 publication

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

Photoionization of CO2-CO-O2 mixtures. Formation and reactions of ion clusters

A Positive-Ion Reaction Mechanism for the Radiation Induced Oxidation of Carbon Monoxide in the High Dose Rate Radiolysis of CO–O2 Mixtures

Edelgasreaktionen in der Strahlenchemie

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A Positive-Ion Reaction Mechanism for the Radiation Induced Oxidation of Carbon Monoxide in the High Dose Rate Radiolysis of CO–O₂ Mixtures