The Role of Excited Oxygen Molecules in the Formation of the Secondary Ozone Layer at 87 to 97 km

Hänninen, Kari

doi:10.13189/eer.2018.060107

Cited by 2 publications

(2 citation statements)

References 51 publications

(76 reference statements)

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“…The comprehensive information related to the appropriate chemical and photochemical elementary processes in air is published in [69,[79][80][81][82][83][84]. Using this information, one can indicate the following processes (R1)-(R7), with a rate coefficient k, most relevant to the discussed issue.…”

Section: The Influence Of Uv Irradiation On the Very First Breakdown ...mentioning

confidence: 99%

About the possible source of seed electrons initiating the very first breakdown in a DBD operating with the air at atmospheric pressure

Akishev

Karalnik

Medvedev

et al. 2021

Plasma Sources Sci. Technol.

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The conditions of the very first breakdown happening in a periodical dielectric barrier discharge (DBD) are not the same as those in the discharge established regime. The main intriguing problem in the very first breakdown is the source of the initial seed electrons. In this work, the role of atmospheric small negative ions in the appearance of seed electrons is investigated. The very first breakdown was studied by using a pin-to-plane barrier corona and plane-to-plane DBD operated with ambient air. These discharges were driven by fast- and slow-growing applied voltage. The experimental data related to the very first breakdown are presented. A short summary sounds as follows. In the case of a barrier corona initiated by a fast-growing voltage, seed electrons can appear due to their detachment from background negative ions in the bulk. Under a slow-increasing voltage, background ions have the time to be fully adsorbed on the cathode and the anode long before breakdown occurs. In such a case, seed electrons can appear from negative ions desorbed from the cathode. This desorption is induced by a strong electric field in the gap. The latter mechanism can work in a plane-to-plane DBD driven by both fast- and slow-growing applied voltage. Based on numerical calculations, a qualitative explanation of the obtained results is given. The influence of UV irradiation on the very first breakdown was also studied.

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Section: The Influence Of Uv Irradiation On the Very First Breakdown ...mentioning

confidence: 99%

About the possible source of seed electrons initiating the very first breakdown in a DBD operating with the air at atmospheric pressure

Akishev

Karalnik

Medvedev

et al. 2021

Plasma Sources Sci. Technol.

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show abstract

“…It has been suggested that collisions with other molecules (bimolecular mechanism) cause the self-decay. The kinetic energy per kelvin (monatomic ideal gas) is KE avg = 3×[R/2] = 3R/2; per mole it is 3.46 kJ/mol at 273 K [51]. It can be approximated that at 185 K one mole of ozone is receiving in collisions about 2 kJ of kinetic energy.…”

Section: Self-decay Of Ozonementioning

confidence: 99%

Contribution of Excited Ozone and Oxygen Molecules to the Formation of the Stratospheric Ozone Layer

Hänninen¹

2019

eer

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The absorption of UV, visible and near IR radiation by O 3 produces transient, electronically excited O 3. The absorption of thermal IR radiation (λ = 9.065, 9.596 and 14.267 µm) produces vibrationally excited O 3 molecules. Thermal absorption is likely the main factor in the self-decay of O 3. Photoexcitation of ground state O 2 (X 3 Σ g-) by IR and red light radiation produces singlet oxygens (O 2 (a 1 ∆ g) and O 2 (b 1 Σ g

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The Role of Excited Oxygen Molecules in the Formation of the Secondary Ozone Layer at 87 to 97 km

Cited by 2 publications

References 51 publications

About the possible source of seed electrons initiating the very first breakdown in a DBD operating with the air at atmospheric pressure

About the possible source of seed electrons initiating the very first breakdown in a DBD operating with the air at atmospheric pressure

Contribution of Excited Ozone and Oxygen Molecules to the Formation of the Stratospheric Ozone Layer

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