Two photon excitation of the vacuum ultraviolet fluorescence of carbon monoxide

✍ Scribed by R.A. Bernheim; C. Kittrell; D.K. Veirs

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 421 KB
• Volume: 51
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80413-2

✦ Synopsis

The vacuum ~~a~olet fourth positive band spectrum CA ' II-X ' Z+) of CO was excited by two photon absorption of ultraviolet radiation which was produced by frequency doubling the output. of a nitrogen Iasex pumped tunable dye laser. T&e (O-O) througti (Y-O) bands were observed. Position monitoring of the ultraviolet beam provided feedback control for continuous adjustment of the orientation of the angle tuned frequency doubling crystal. In this way the otientation for maximum efficiency of the doubling crystal and t&e point of focus of the ultraviolet beam in the sample cell was maintai_ned during the waveIeagth scan of a band. A solar-blind photomultiplier was used to detect the vacuum ultraviokt fluorescence. 0, P, Q, R, and S rotational lunches were observed, and the new band-head positions agree with those predicted from the previously observed sake-photon spectra.