Absolute angle-differential vibrational excitation cross sections for electron collisions with diacetylene
- Allan, Michael Department of Chemistry, University of Fribourg, Switzerland
- May, Olivier Department of Chemistry, University of Fribourg, Switzerland
- Fedor, Juraj Department of Chemistry, University of Fribourg, Switzerland
- Ibănescu, Bogdan C. Department of Chemistry, University of Fribourg, Switzerland
- Andrić, Lidija UPMC, Université Paris 06, LCPMR, Paris, France
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06.05.2011
Published in:
- Physical Review A. - 2011, vol. 83, no. 5, p. 052701
English
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 ²Πu resonance at 1 eV (autodetachment width ~30 meV) and a ²Πg 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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Chimie
- Language
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- English
- Classification
- Chemistry
- License
- License undefined
- Identifiers
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- RERO DOC 24897
- DOI 10.1103/PhysRevA.83.052701
- Persistent URL
- https://folia.unifr.ch/unifr/documents/302182
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