Konstanz 1998 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
MO: Molekülphysik
MO 13: Spektroskopie III
MO 13.3: Talk
Thursday, March 19, 1998, 14:30–14:45, M629
The effect of vibrational and electronic autoionization on the CO+ A 2Π vibrational populations — •E.E. Rennie1, M.A. Hayes2, D.M.P. Holland2, M.A. MacDonald2, D.A. Shaw2, and L.G. Shpinkova3 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin — 2Daresbury Laboratory, Daresbury, Warrington, Cheshire, England, WA4 4AD — 3Institute of Nuclear Physics, Moscow State University, Moscow, Russia
Vibrationally resolved relative fluorescence cross sections have been measured for the CO+ A 2Π→X 2Σ+ transition using monochromated synchrotron radiation between 618 and 750 Angstroms. In this wavelength region the photoionization spectrum is dominated by intense autoionizing resonances belonging to the Rydberg series converging onto the various vibrational levels of the CO+ A 2Π or the B −2Σ+ ionization thresholds. Autoionization from these Rydberg states into the CO+ A 2Π state causes significant variations to occur in the A 2Π→X 2Σ+ fluorescence cross sections and the CO+ A 2Π vibrational branching ratios. The effect of vibrational and electronic autoionization on the CO+ A 2Π populations in wavelength regions encompassing resonant photoabsorption transitions will be disscussed.