Angular distributions for the excitation of vibronic states by resonant electron molecule reactions

Andrick, D; Read, F H

doi:10.1088/0022-3700/4/3/010

Cited by 82 publications

(43 citation statements)

References 12 publications

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“…We attempted to understand our observations using the theory of Read [52] and Andrick and Read [53]. It predicts a (1 + 7 cos 2 θ ) distribution for a 2 u resonance and a σ g final vibrational state, in good agreement with the angular distribution observed for the C≡C stretch excitation ν 2 , and a qualitative agreement with that observed for 2ν 6,8 excitation and for ν 2 + 2ν 6,8 excitation (Fig.…”

Section: Cross Sections For Vibrational Excitationsupporting

confidence: 63%

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Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene

et al. 2011

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Absolute vibrational excitation cross sections were measured for diacetylene (1,3-butadiyne). The selectivity of vibrational excitation reveals detailed information about the shape resonances. Excitation of the C≡C stretch and of double quanta of the C−H bend vibrations reveals a 2 u resonance at 1 eV (autodetachment width ∼30 meV) and a 2 g resonance at 6.2 eV (autodetachment width 1-2 eV). There is a strong preference for excitation of even quanta of the bending vibration. Excitation of the C−H stretch vibration reveals σ * resonances at 4.3, 6.8, and 9.8 eV, with autodetachment widths of ∼2 eV. Detailed information about resonances permits conclusions about the mechanism of the dissociative electron attachment.

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Section: Cross Sections For Vibrational Excitationsupporting

confidence: 63%

“…• , and are well reproduced by the the Andrick-Read theory [52,53]. The angular distributions of the π vibrations, odd quanta of C−H bend ν 6,8 , alone or in combination with ν 2 , are reproduced only qualitatively by the Andrick-Read theory, in the sense of having a maximum at 90…”

Section: Discussionmentioning

confidence: 88%

Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene

et al. 2011

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“…6 The angular dependence of inelastically scattered electrons measured by Andrick and Danner 6 has been analyzed recently by Andrick and Read. 15 Using symmetry arguments they conclude that the angular distributions support the hypothesis that the compound state is nearly linear. The lifetime inferred here together with the absence of structure due to the compound-state bending mode also support this hypothesis.…”

Section: Iew Letters 7 February 1972mentioning

confidence: 83%

Elastic Scattering of Low-Energy Electrons at 180° in CO2

Burrow

Sanche

1972

Phys. Rev. Lett.

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“…These DCSs shed light in understanding which angular momentum dominates in the resonant scattering process. The angular momentum contribution of the scattered electron in the molecular frame is shown in Table III, with the angular distributions of the vibrational DCSs, σ (θ) in the laboratory frame must have the following form: 53,54 …”

Section: Vibrational Excitationsmentioning

confidence: 99%

Crossed-beam experiment for the scattering of low- and intermediate-energy electrons from BF3: A comparative study with XF3 (X = C, N, and CH) molecules

Hoshino

Limão‐Vieira

Suga

et al. 2015

The Journal of Chemical Physics

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Absolute differential cross sections (DCSs) for electron interaction with BF 3 molecules have been measured in the impact energy range of 1.5-200 eV and recorded over a scattering angle range of 15 • -150 • . These angular distributions have been normalized by reference to the elastic DCSs of the He atom and integrated by employing a modified phase shift analysis procedure to generate integral cross sections (ICSs) and momentum transfer cross sections (MTCSs). The calculations of DCSs and ICSs have been carried out using an independent atom model under the screening corrected additivity rule (IAM-SCAR). The present elastic DCSs have been found to agree well with the results of IAM-SCAR calculation above 20 eV, and also with a recent Schwinger multichannel calculation below 30 eV. Furthermore, in the comparison with the XF 3 (X = B, C, N, and CH) molecules, the elastic DCSs reveal a similar angular distribution which are approximately equal in magnitude from 30 to 200 eV. This feature suggests that the elastic scattering is dominated virtually by the 3-outer fluorine atoms surrounding the XF 3 molecules. The vibrational DCSs have also been obtained in the energy range of 1.5-15 eV and vibrational analysis based on the angular correlation theory has been carried out to explain the nature of the shape resonances. Limited experiments on vibrational inelastic scattering confirmed the existence of a shape resonance with a peak at 3.8 eV, which is also observed in the vibrational ICS. Finally, the estimated elastic ICSs, MTCSs, as well as total cross sections are compared with the previous cross section data available. C 2015 AIP Publishing LLC. [http://dx

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Angular distributions for the excitation of vibronic states by resonant electron molecule reactions

Cited by 82 publications

References 12 publications

Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene

Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene

Elastic Scattering of Low-Energy Electrons at 180° in CO2

Crossed-beam experiment for the scattering of low- and intermediate-energy electrons from BF3: A comparative study with XF3 (X = C, N, and CH) molecules

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