A Mass Spectrometric Study of Normal Oxygen and Oxygen Subjected to Electrical Discharge

Herron, John T.; Schiff, H. I.

doi:10.1139/v58-170

Cited by 73 publications

(15 citation statements)

References 11 publications

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“…The detection of O * 2 is, however, not straightforward. We employed a method that seeks to identify singlet oxygen in the threshold ionization curves obtained by scanning the electron energy in the QMS ionizer (Herron and Schiff, 1958;Pulpytel et al, 2005). Excited molecules are already ionized at lower electron energies and so leave traces in the curves at energies lower than the appearance potential of the ground state molecule.…”

Section: Uncertainties Sources Of Error and Recommendationsmentioning

confidence: 99%

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

et al. 2015

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Abstract. The middle-and upper-atmospheric energy budget is largely dominated by reactions involving atomic oxygen (O). Modeling of these processes requires detailed knowledge about the distribution of this oxygen species. Understanding the mutual contributions of atomic oxygen and wave motions to the atmospheric heating is the main goal of the rocket project WADIS (WAve propagation and DISsipation in the middle atmosphere). It includes, amongst others, our instruments for the measurement of atomic oxygen that have both been developed with the aim of resolving density variations on small vertical scales along the trajectory. In this paper the instrument based on catalytic effects (PHLUX: Pyrometric Heat Flux Experiment) is introduced briefly. The experiment employing solid electrolyte sensors (FIPEX: Flux φ(Phi) Probe Experiment) is presented in detail. These sensors were laboratory calibrated using a microwave plasma as a source of atomic oxygen in combination with mass spectrometer reference measurements. The spectrometer was in turn calibrated for O with a method based on methane. In order to get insight into the horizontal variability, the rocket payload had instrument decks at both ends. Each housed several sensor heads measuring during both the up-and downleg of the trajectory. The WADIS project comprises two rocket flights during different geophysical conditions. Results from WADIS-1 are presented, which was successfully launched in June 2013 from the Andøya Space Center, Norway. FIPEX data were sampled at 100 Hz and yield atomic oxygen density profiles with a vertical resolution better than 9 m. This allows density variations to be studied on very small spatial scales. Numerical simulations of the flow field around the rocket were done at several points of the trajectory to assess the influence of aerodynamic effects on the measurement results. Density profiles peak at 3 × 10 10 cm −3 at altitudes of 93.6 and 96 km for the up-and downleg, respectively.

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Section: Uncertainties Sources Of Error and Recommendationsmentioning

confidence: 99%

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

et al. 2015

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“…Dye (triplet) -[-02 (triplet) = dye (singlet) q-O2(IA) (5) Only recently, however, has fairly convincing evidence been obtained for the participation of electronically activated oxygen in chemical reactions.…”

Section: Reactions Of Electronically Excited Oxygenmentioning

confidence: 99%

Mechanisms of Oxidation with Oxygen

Taube

1965

The Journal of General Physiology

138

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Several topics are dealt with in discussing the reactions of molecular oxygen, but a common goal is pursued in each: to try to understand the reactions in terms of the fundamental properties of the oxygen molecule, and of the other reactants. The paper first describes the electronic structure of oxygen and of two low-lying electronically excited states. Concern with the low-lying electronically excited states is no longer the sole property of spectroscopists; recently, evidence has been presented for the participation of such activated molecules in chemical reactions. The chemistry of oxygen is dominated by the fact that the molecule in the ground state has two unpaired electrons, whereas the products of oxidation in many important reactions have zero spin. In its reactions with transition metal ions the restrictions imposed by the spin state of the oxygen molecule are easily circumvented. A number of reactions of oxygen with metal ions have been studied in considerable detail; conclusions on basic aspects of the reaction mechanism are outlined. Among the most interesting reactions of oxygen are those in which it is reversibly absorbed by reducing agents. Reversible absorption to form a peroxide in the bound state is possible; some of the conditions which must be fulfilled by a reducing system to qualify as storing oxygen in this way are reasonably well understood and are here enunciated. Little has been done on the formation of oxygen from water; some factors involved in this process are discussed.

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“…reactions [8] and [9]. The presence of both free CH3 and C?H5 radicals is thus accounted for, and the formation of the minor products can then be readily explained by the reactions 3ilfass spectronzeLer analysis of the fractioz isolated by GLC as 2-ethyl butanal indicated also the presence of some unidentified inrp~~rities.…”

Section: Cis-and Trans-) (Cis-and Trans-)mentioning

confidence: 95%

“…I11 the presence of a large amount of nitrous oxide, excited mercury atoms are essentially exclusivelr quenched by nitrous oxide and the molecular oxygen acts as an efficient scavenger for the free radicals forilled in the pressure-independei~t fragmentation reactions [8] and [9].…”

Section: Cis-and Trans-) (Cis-and Trans-)mentioning

confidence: 99%

See 1 more Smart Citation

THE EFFECT OF MOLECULAR OXYGEN ON THE REACTION OF OXYGEN ATOMS WITH cis-2-PENTENE

Sato¹,

Cvetanović²

1959

Can. J. Chem.

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A Mass Spectrometric Study of Normal Oxygen and Oxygen Subjected to Electrical Discharge

Cited by 73 publications

References 11 publications

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

Measurement of atomic oxygen in the middle atmosphere using solid electrolyte sensors and catalytic probes

Mechanisms of Oxidation with Oxygen

THE EFFECT OF MOLECULAR OXYGEN ON THE REACTION OF OXYGEN ATOMS WITH cis-2-PENTENE

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