Electronically excited molecular nitrogen and molecular oxygen in the high-latitude upper atmosphere

Kirillov, A. S.

doi:10.5194/angeo-26-1159-2008

Cited by 19 publications

(31 citation statements)

References 41 publications

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“…The model of vibrational populations of electronically excited states of N 2 and O 2 is similar to the one by Kirillov (2008a). Here we consider three principal processes responsible for the electronic excitation and quenching of triplet N 2 and electronically excited O 2 :…”

Section: Modelmentioning

confidence: 92%

“…Intramolecular electron energy transfer process with energetically quasi-resonant vibrational excitation of the ground X 1 + g state with v=25, 26 is the only possible mechanism of the removal. As in Kirillov (2008a) collisional quenching processes for the C 3 u state are not included in this consideration since radiational lifetime is sufficiently less than collisional one for the state at the altitudes of lower thermosphere and mesosphere. Also in contrast with Morrill and Benesch (1996) we do not consider any contribution of E 3 + g and D 3 + u states in vibrational populations of mentioned five triplet states.…”

Section: Vibrational Population Of Electronically Excited Nmentioning

confidence: 99%

“…As in Kirillov (2008a) we apply the method of "excitation energy costs" in the estimation of the rates of electronic excitation by electron impact.…”

Section: Modelmentioning

confidence: 99%

“…We suggest to consider the rate of an intramolecular process independent on the kind of the collision with N 2 or O 2 . So the sum of concentrations [N 2 Kirillov (2008a). The rate coefficients for all intermolecular and intramolecular electron energy transfer processes are presented by Kirillov (2008a).…”

Section: Vibrational Population Of Electronically Excited Nmentioning

confidence: 99%

“…Firstly, high-energetic auroral electrons penetrate to these altitudes causing the type B aurora (Gattinger and Vallance Jones, 1979;Gattinger et al, 1985). Benesch (1981Benesch ( , 1983, Morrill and Benesch (1996), Kirillov (2008a) have shown that vibrational populations of the triplet manifolds of molecular nitrogen are strongly affected by collision processes at the altitudes. This dependence of vibrational populations of Correspondence to: A. S. Kirillov (kirillov@pgia.ru) electronically excited N 2 on the rates of collisional processes causes a redistribution of First Positive Group (1PG) relative intensities with the increase in the density of the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

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Electronic kinetics of molecular nitrogen and molecular oxygen in high-latitude lower thermosphere and mesosphere

Kirillov

2010

Ann. Geophys.

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Abstract. Total quenching rate coefficients of Herzberg states of molecular oxygen and three triplet states of molecular nitrogen in the collisions with O 2 and N 2 molecules are calculated on the basis of quantum-chemical approximations. The calculated rate coefficients of electronic quenching of O * 2 and N * 2 molecules show a good agreement with available experimental data. An influence of collisional processes on vibrational populations of electronically excited N 2 and O 2 molecules is studied for the altitudes of high-latitude lower thermosphere and mesosphere during auroral electron precipitation. It is indicated that molecular collisions of metastable nitrogen N 2 (A 3 + u ) with O 2 molecules are principal mechanism in electronic excitation of both Herzberg states c 1 − u , A 3 u , A 3 + u and high vibrational levels of singlet states a 1 g and b 1 + g of molecular oxygen O 2 at these altitudes.

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Section: Modelmentioning

confidence: 92%

Section: Vibrational Population Of Electronically Excited Nmentioning

confidence: 99%

“…As in Kirillov (2008a) we apply the method of "excitation energy costs" in the estimation of the rates of electronic excitation by electron impact.…”

Section: Modelmentioning

confidence: 99%

Section: Vibrational Population Of Electronically Excited Nmentioning

confidence: 99%