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Vibrational branching ratios of N2O+(Ã 2Σ+) produced by electron impact on N2O

✍ Scribed by Hiroshi Kume; Hisanori Shimada; Mikio Kobayashi; Ikuo Tokue; Yoshio Ito

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
482 KB
Volume
179
Category
Article
ISSN
0009-2614

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✦ Synopsis

Emission spectra of the N20c (A %+-R "II,) system produced by electron impact on jet-cooled N20 have been measured at impact energies of 18-300 eV. The vibrational population for the I' level relative to the 0' level of the A state was found to decrease rapidly with increasing impact energy and level-off above 30 eV, whereas that for the 3* level was essentially constant. The branching ratio, u( I')/u( O'), at higher impact energies deviates from what can be expected from vertical ionization based on the Franck-Condon principle. This non-Franck-Condon behavior is probably caused by autoionization of the Rydberg states converging to the C2Zf ion state.

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