Excitation of O+2 First Negative Bands by Electron Impact on O2

Details Excitation of O+2 First Negative Bands by Electron Impact on O2 Excitation of O+2 First Negative Bands by Electron Impact on O2

May 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970phrva...1.1410b&link_type=abstract

Physical Review A, vol. 1, Issue 5, pp. 1410-1415

Physics

5

Scientific paper

Absolute cross sections for the electron-impact excitation of the O+2 first negative bands were measured from threshold to 400 eV and extrapolated to 1000 eV by means of a Bethe-Oppenheimer relationship. The peak cross sections for the (n+1, n) and (n+2, n) sequences were found to be 5.30×10-18 cm2+/-10% and 2.10×10-18 cm2+/-10% at 100 eV, respectively. The cross sections for the (0,0) and (1,0) bands had a maximum value of 2.14×10-18 cm2+/-15% and 4.33×10-18 cm2+/-15%, respectively. The ratio of the total ionization cross section of O2 to the excitation cross sections of the first negative bands was nearly constant over the energy range 30-1000 eV; it had an average value of 64 for the (1,0) band. The lifetime of the ν'=1 level of the b4Σ-g state was found to be 1.19 μsec+/-5%.

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