Raman ultraviolet optical double resonance spectroscopy in gas phase acetylene

B. L. Chadwick*, B. J. Orr

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)


The Raman UV double-resonance (Raman UVDR) approach has been implemented with a high SNR in acetylene gas [C2H2(g)]. Coherent Raman excitation (by pulsed two-color laser irradiation at 532 and approximately 594 nm) allows selective preparation of C2H2 in discrete rotational states of the ν = 1 vibrational level. This excitation is probed by tunable pulsed UV radiation (approximately 240 nm) and detected by broadband UV LIF (300-400 nm). The molecular excitation scheme and the spectra are shown and discussed. The spectra provide kinetic data that elucidate state-to-state rovibrational energy transfer processes involving C2H2. In another Raman UVDR spectroscopic approach, state-specific Raman spectra are recorded in which the UV laser probes a single rovibrational state selectively and the Raman excitation frequency is scanned. The observed Raman linewidth of 0.06 cm-1 is limited by the optical bandwidth of the lasers used.

Original languageEnglish
Title of host publicationXVII International Quantum Electronics Conference
Subtitle of host publicationOSA Technical Digest
EditorsA. Owyoung, C. Shank, S. Chu, E. Ippen
Place of PublicationWashington, DC
PublisherOptical Society of America (OSA)
Number of pages3
ISBN (Print)155752145X
Publication statusPublished - 1990
Event17th International Conference on Quantum Electronics - IQEC '90 - Anaheim, CA, USA
Duration: 21 May 199025 May 1990


Other17th International Conference on Quantum Electronics - IQEC '90
CityAnaheim, CA, USA


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