OH Emission Bands in the Spectrum of the Night Sky. II.

Meinel, A. B.

doi:10.1086/145321

Cited by 157 publications

(55 citation statements)

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“…is the main source of vibrationally excited OH near the mesopause, producing an emission layer -first identified by Meinel (1950) -that is centered at about 87 km with a full width at half maximum (FWHM) of about 8-10 km (e.g. Baker and Stair, 1988).…”

Section: Introductionmentioning

confidence: 99%

On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

et al. 2012

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Abstract. Measurements of the OH Meinel emissions in the terrestrial nightglow are one of the standard ground-based techniques to retrieve upper mesospheric temperatures. It is often assumed that the emission peak altitudes are not strongly dependent on the vibrational level, although this assumption is not based on convincing experimental evidence. In this study we use Envisat/SCIAMACHY (Scanning Imaging Absorption spectroMeter for Atmospheric CHartographY) observations in the near-IR spectral range to retrieve vertical volume emission rate profiles of the OH(3-1), OH(6-2) and OH(8-3) Meinel bands in order to investigate whether systematic differences in emission peak altitudes can be observed between the different OH Meinel bands. The results indicate that the emission peak altitudes are different for the different vibrational levels, with bands originating from higher vibrational levels having higher emission peak altitudes. It is shown that this finding is consistent with the majority of the previously published results. The SCIAMACHY observations yield differences in emission peak altitudes of up to about 4 km between the OH(3-1) and the OH(8-3) band.The observations are complemented by model simulations of the fractional population of the different vibrational levels and of the vibrational level dependence of the emission peak altitude. The model simulations reproduce the observed vibrational level dependence of the emission peak altitude well -both qualitatively and quantitatively -if quenching by atomic oxygen as well as multi-quantum collisional relaxation by O 2 is considered. If a linear relationship between emission peak altitude and vibrational level is assumed, then a peak altitude difference of roughly 0.5 km per vibrational level is inferred from both the SCIAMACHY observations and the model simulations.

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Section: Introductionmentioning

confidence: 99%

On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

et al. 2012

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“…These include understanding the observed emissions from cometary atmospheres, 1 in modeling control processes of plasma techniques that seek to ameliorate pollution from fossil fuel combustion, 2 and understanding the origin of the important atmospheric Meinel bands. 3,4 In addition, the initial physical stage of radiation interaction with biological matter can be understood on the basis of the analysis of the track structure caused by charged particles. The knowledge of electron interactions with water molecules is therefore vital in understanding radiation damage.…”

Section: Introductionmentioning

confidence: 99%

Cross sections and oscillator strengths for electron-impact excitation of the ÃB11 electronic state of water

Thorn

Brunger²,

Teubner³

et al. 2007

The Journal of Chemical Physics

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The authors report absolute differential and integral cross section measurements for electron-impact excitation of the ÃB11 electronic state of water. This is an important channel for the production of the OH (X̃Π2) radical, as well as for understanding the origin of the atmospheric Meinel [Astrophys. J. 111, 555 (1950)] bands. The incident energy range of our measurements is 20–200eV, while the angular range of the differential cross section data is 3.5°–90°. This is the first time such data are reported in the literature and, where possible, comparison to existing theoretical work, and new scaled Born cross sections calculated as a part of the current study, is made. The scaled Born cross sections are in good agreement with the integral cross sections deduced from the experimental differential cross sections. In addition they report (experimental) generalized oscillator strength data at the incident energies of 100 and 200eV. These data are used to derive a value for the optical oscillator strength which is found to be in excellent agreement with that from an earlier dipole (e,e) experiment and an earlier photoabsorption experiment.

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“…It is responsible for nascent hydroxyl radicals in vibrationally excited states and for the hydroxyl spectra [14][15][16][17] in night-sky airglow. Thus, it is not surprising that there have been many experimental measurements of the H + O 3 f HO + O 2 thermal rate coefficient.…”

Section: Introductionmentioning

confidence: 99%

Quantum Dynamical Rate Constant for the H + O₃ Reaction Using a Six-Dimensional Double Many-Body Expansion Potential Energy Surface

1997

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We present a quantum mechanical, three-dimensional, infinite-orden-sudden-approximation study of the H + O 3 atmospheric reaction using a recently reported double many-body expansion potential energy surface for ground-state HO 3 . The results are compared with existing experimental data and previously reported quasiclassical trajectory calculations which employed the same interaction potential. Agreement with the recommended experimental data is moderate, but encouraging when compared with the data of Clyne and Monkhouse, which extends over the range of temperatures 300 e T/K e 650, and with the recent measurement of Greenblatt and Wiesenfeld for T ) 300 K. In comparison with the classical trajectory results, the agreement is also moderate, the differences being attributed to both methodological approximations in the quantum formalism and the problem of zero-point energy leakage in classical dynamics.

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OH Emission Bands in the Spectrum of the Night Sky. II.

Cited by 157 publications

References 0 publications

On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

Cross sections and oscillator strengths for electron-impact excitation of the ÃB11 electronic state of water

Quantum Dynamical Rate Constant for the H + O₃ Reaction Using a Six-Dimensional Double Many-Body Expansion Potential Energy Surface

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OH Emission Bands in the Spectrum of the Night Sky. II.

Cited by 157 publications

References 0 publications

On the dependence of the OH&lt;sup&gt;*&lt;/sup&gt; Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

On the dependence of the OH&lt;sup&gt;*&lt;/sup&gt; Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

Cross sections and oscillator strengths for electron-impact excitation of the ÃB11 electronic state of water

Quantum Dynamical Rate Constant for the H + O3 Reaction Using a Six-Dimensional Double Many-Body Expansion Potential Energy Surface

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On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

On the dependence of the OH<sup>*</sup> Meinel emission altitude on vibrational level: SCIAMACHY observations and model simulations

Quantum Dynamical Rate Constant for the H + O₃ Reaction Using a Six-Dimensional Double Many-Body Expansion Potential Energy Surface