TITLE

Luminescent charge transfer in a beam of CO++ colliding with Ar, N2, H2, D2 and CO

AUTHOR(S)
Ehbrecht, A.; Mustafa, N.; Ottinger, Ch.; Herman, Z.
PUB. DATE
December 1996
SOURCE
Journal of Chemical Physics;12/8/1996, Vol. 105 Issue 22, p9833
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Luminescent charge transfer of CO++(3Π,1Σ+) ions in a beam with several atomic and molecular target species in a scattering cell was observed at 60–2000 eVlab projectile energies. Emission from CO+(B 2Σ+→X 2Σ+) was spectrally analyzed with a resolution of up to 1 Å full width at half maximum. In the case of CO+++CO collisions, CO+(B) emission due to electron capture by the projectile and to target ionization were distinguished using isotopic substitution. CO+(A 2Π→X 2Σ+) emission from the ionized target was also observed in this reaction. Similarly, with N2 as a target, strong N+2(B 2Σ+u→X 2Σ+g) emission was observed. The absolute cross sections for CO+(B) formation are 1–5 Å2. The CO+(B) vibrational excitation at 2000 eV can be explained by Franck–Condon transitions from the CO++(3Π)/(1Σ+) beam components in the ratio 1:2. At low energy the product CO+ vibrational excitation is higher, especially from collisions with Ar. The vibrational population distribution differs from that derived from earlier translational energy spectra, possibly due to a different CO++(3Π/1Σ+) beam composition. The rotational excitation is in all cases strikingly low, even at low impact energy. This is ascribed to the large electron capture radius (∼2.8 Å). © 1996 American Institute of Physics.
ACCESSION #
7623780

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics