Absolute Collision Cross Sections for Low Energy Electron Scattering from NO: The Role of Resonances in Elastic Scattering and Vibrational Excitation

Jelisavcic, Milica; Panajotović, Radmila; Buckman, Stephen

doi:10.1103/physrevlett.90.203201

Cited by 41 publications

(55 citation statements)

References 14 publications

(19 reference statements)

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“…However, in contrast to what was seen in earlier experiments [8], we do not find a complete supression of the lowest few peaks in cross sections for exciting higher vibrational levels, but instead find encouragingly good agreement with the recent experiments of Allan [9,13].…”

Section: Discussioncontrasting

confidence: 57%

“…In the case of elastic scattering, there is excellent agreement bewteen the two sets of measurements above 0.8 eV, whereas the peak cross sections values near 0.45 eV and 0.6 eV measured by Allan [9,13] are relatively larger than those measured by Jelisavcic et al [8]. The agreement with theory is also rather good, the principal difference being a somewhat larger value for the background cross section given by theory.…”

Section: A Elastic Scattering and Vibrational Excitationsupporting

confidence: 64%

“…New experimental determinations of the cross sections by Allan [9,13] have since appeared, which differ near threshold from the experiments [5,7,8] with which we originally compared and which do not show the dramatic suppression of peaks near threshold that some earlier experiments suggested. These facts prompted the present study, in which the nuclear dynamics problem is treated with a more elaborate nonlocal resonance model that should be better able to treat the threshold region.…”

Section: Introductionmentioning

confidence: 99%

“…NO is also used as a plasma gas and plays important functional roles in a variety of physiological systems. Although there have been a number of experimental studies on the low-energy behavior of the electron-NO collision cross sections [1][2][3][4][5][6][7][8][9], relatively little has been done on the theoretical front [10,11], particularly in the energy region below 2 eV, which is dominated by negative ion resonances. Calculations in this energy range were initiated in our previous study (Zhang et al [12]), which presented ab initio determinations of elastic and vibrational excitation cross sections using the local complex potential or "boomerang" model, with resonance parameters extracted from electronic fixed-nuclei variational scattering calculations.…”

Section: Introductionmentioning

confidence: 99%

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Nonlocal model of dissociative electron attachment and vibrational excitation of NO

et al. 2005

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We present the results of an ab initio study of elastic scattering and vibrational excitation of NO by electron impact in the low-energy (0-2 eV) region where the cross sections are dominated by resonance contributions. The 3 Σ − , 1 ∆ and 1 Σ + NO − resonance lifetimes are taken from our earlier study [Phys. Rev. A 69, 062711 (2004)], but the resonance energies used here are obtained from new configuration-interaction studies. Here we employ a more elaborate nonlocal treatment of the nuclear dynamics, which is found to remedy the principal deficiences of the local complex potential model we employed in our earlier study, and gives cross sections in better agreement with the most recent experiments. We also present cross sections for dissociative electron attachment to NO leading to ground state products, O − ( 2 P) + N( 4 S). The calculations show that, while the peak cross sections starting from NO in its ground vibrational state are very small (∼ 10 −20 cm 2 ), the cross sections are extremely sensitive to vibrational excitation of the target and should be readily observable for target NO molecules excited to ν = 10 and above.

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Section: Discussioncontrasting

confidence: 57%

Section: A Elastic Scattering and Vibrational Excitationsupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonlocal model of dissociative electron attachment and vibrational excitation of NO

et al. 2005

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“…[3] After new results for the cross sections of low-energy electron impact vibrational excitation of NO were obtained by swarm [Josić et al, 2001] and binary collision experiments [Jelisavcic et al, 2003], it was shown in an equilibrium calculation [Campbell et al, 2004] that such excitation could account for a significant part of the auroral NO infrared emission at a height of 120 km, assuming the NO density to be the maximum seen in observations. Here we revisit the subject for two reasons.…”

Section: Introductionmentioning

confidence: 99%

Electron impact contribution to infrared NO emissions in auroral conditions

Campbell

Brunger

2007

Geophysical Research Letters

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[1] Infrared emissions from nitric oxide, other than nightglow, are observed in aurora, principally due to a chemiluminescent reaction between excited nitrogen atoms and oxygen molecules that produces vibrationally excited NO. The rates for this chemiluminescent reaction have recently been revised. Based on new measurements of electron impact vibrational excitation of NO, it has been suggested that electron impact may also be significant in producing auroral NO emissions. We show results of a detailed calculation which predicts the infrared spectrum observed in rocket measurements, using the revised chemiluminescent rates and including electron impact excitation. For emissions from the second vibrational level and above, the shape of the spectrum can be reproduced within the statistical errors of the analysis of the measurements, although there is an unexplained discrepancy in the absolute value of the emissions. The inclusion of electron impact improves the agreement of the shape of the predicted spectrum with the measurements by accounting for part of the previously unexplained peak in emissions from the first vibrational level. Citation: Campbell, L., and M. J. Brunger (2007), Electron impact contribution to infrared NO emissions in auroral conditions, Geophys. Res. Lett., 34, L22102,

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Electron Scattering by Atoms, Ions, and Molecules

Bartschat

Burke

Crowe

2009

Digital Encyclopedia of Applied Physics

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A summary is given of many important advances in the scattering of electrons from atoms, ions, and molecules up to the summer of 2008. Recently introduced experimental techniques, which lead to more efficient studies, are discussed together with a wide range of increasingly sophisticated theoretical methods. Examples of experimental and theoretical data are presented and compared where appropriate.

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Absolute Collision Cross Sections for Low Energy Electron Scattering from NO: The Role of Resonances in Elastic Scattering and Vibrational Excitation

Cited by 41 publications

References 14 publications

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Electron impact contribution to infrared NO emissions in auroral conditions

Electron Scattering by Atoms, Ions, and Molecules

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