Concentration-modulated absorption spectroscopy. II. temporal variation of gain

R. A. Beaman*, A. N. Davies, A. J. Langley, W. Jeremy Jones, J. Baran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The application of concentration-modulated absorption spectroscopy, COMAS, to the determination of lifetimes of the electronic states of absorbing species is discussed. The theory behind the lifetime calculations is described and experimental results for lithium in a hydrocarbon flame are reported. The lifetime of the 2p2P 3 2, 1 2 and 3d2D 5 2, 3 2 states are respectively measured as 528±20 and 216±20 ps for lithium atoms in an ethyne-air flame. The power of the technique in measuring accurately the lifetimes of high-lying thermally excited state species is discussed and areas for further work are suggested.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalChemical Physics
Issue number1
Publication statusPublished - 1 Jan 1986
Externally publishedYes


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