High-Resolution Infrared Diode Laser Spectroscopy of X2Π CCl1

Pei Jin, Bor Chen Chang, Ruian Fei, Trevor J. Sears

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


The high-resolution transient infrared spectrum of X2Π CCl near 12.2 μm was measured by diode laser absorption spectroscopy following 193 nm excimer laser photolysis of CHClBr2. Many lines in the v = 1-0, 2 ← 1, 3-2, 4-3, and 5-4 bands for C35Cl were identified in addition to lines in the first four of these vibrational bands for C37Cl. The new data were combined in a least squares fit to all the available high resolution infrared data, and combination differences from the electronic spectrum of the radical, including both chlorine isotopes simultaneously. The equilibrium molecular parameters so determined are more complete than previously available and should reliably predict higher vibrational bands. The results were used to estimate a potential curve for the radical, from the Rydberg-Klein-Rees procedure, and fits to the data for the individual isotopes allowed a separation of the spin-rotation and centrifugal distortion of the spin-orbit fine structure terms.

Original languageEnglish
Pages (from-to)189-194
Number of pages6
JournalJournal of molecular spectroscopy
Issue number1
StatePublished - Mar 1997


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