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Title: Dissociative Excitation of Acetylene Induced by Electron Impact: Excitation-emission Cross-sections

Abstract

The optical emission spectrum of acetylene excited by monoenergetic electrons was studied in the range of 190–660 nm. The dissociative excitation and dissociative ionization associated with excitation of the ions initiated by electron impact were dominant processes contributing to the spectrum. The spectrum was dominated by the atomic lines (hydrogen Balmer series, carbon) and molecular bands (CH(A–X), CH(B–X), CH{sup +}(B–A), and C{sub 2}). Besides the discrete transitions, we have detected the continuum emission radiation of ethynyl radical C{sub 2}H(A–X). For most important lines and bands of the spectrum we have measured absolute excitation-emission cross sections and determined the energy thresholds of the particular dissociative channels.

Authors:
; ; ;  [1]
  1. Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Mlynská dolina F-2, 842 48 Bratislava (Slovakia)
Publication Date:
OSTI Identifier:
22663592
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 841; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ACETYLENE; CARBON; CROSS SECTIONS; ELECTRON-MOLECULE COLLISIONS; ELECTRONS; EMISSION; EMISSION SPECTRA; EXCITATION; HYDROGEN; IONIZATION; RADICALS

Citation Formats

Országh, Juraj, Danko, Marián, Čechvala, Peter, and Matejčík, Štefan, E-mail: matejcik@fmph.uniba.sk. Dissociative Excitation of Acetylene Induced by Electron Impact: Excitation-emission Cross-sections. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA6E54.
Országh, Juraj, Danko, Marián, Čechvala, Peter, & Matejčík, Štefan, E-mail: matejcik@fmph.uniba.sk. Dissociative Excitation of Acetylene Induced by Electron Impact: Excitation-emission Cross-sections. United States. doi:10.3847/1538-4357/AA6E54.
Országh, Juraj, Danko, Marián, Čechvala, Peter, and Matejčík, Štefan, E-mail: matejcik@fmph.uniba.sk. Sat . "Dissociative Excitation of Acetylene Induced by Electron Impact: Excitation-emission Cross-sections". United States. doi:10.3847/1538-4357/AA6E54.
@article{osti_22663592,
title = {Dissociative Excitation of Acetylene Induced by Electron Impact: Excitation-emission Cross-sections},
author = {Országh, Juraj and Danko, Marián and Čechvala, Peter and Matejčík, Štefan, E-mail: matejcik@fmph.uniba.sk},
abstractNote = {The optical emission spectrum of acetylene excited by monoenergetic electrons was studied in the range of 190–660 nm. The dissociative excitation and dissociative ionization associated with excitation of the ions initiated by electron impact were dominant processes contributing to the spectrum. The spectrum was dominated by the atomic lines (hydrogen Balmer series, carbon) and molecular bands (CH(A–X), CH(B–X), CH{sup +}(B–A), and C{sub 2}). Besides the discrete transitions, we have detected the continuum emission radiation of ethynyl radical C{sub 2}H(A–X). For most important lines and bands of the spectrum we have measured absolute excitation-emission cross sections and determined the energy thresholds of the particular dissociative channels.},
doi = {10.3847/1538-4357/AA6E54},
journal = {Astrophysical Journal},
number = 1,
volume = 841,
place = {United States},
year = {Sat May 20 00:00:00 EDT 2017},
month = {Sat May 20 00:00:00 EDT 2017}
}