Abstract

The increasing availability of stable isotopes has stimulated the development of methods for the analysis of these materials. Among the most useful of these isotopes is ¹³C, which has a natural abundance of 1.1%. NMR and mass spectrometry techniques probably furnish the most sensitive methods of analysis, but dispersive and nondispersive infrared techniques offer promise as the most economical method when sample volume is not critical and where the isotope is present in a simple diatomic molecule. McDowell has discussed the analysis of ¹³C¹⁶O by dispersive infrared spectroscopy using the fundamental stretching vibration at 4664 nm (2144 cm⁻¹). This paper is concerned with the analysis of ¹³C¹⁶O using the infrared overtone bands around 2410 nm (4145 cm⁻¹).

Spectral measurements of high temperature ¹³C¹⁶O₂ and 13_C¹⁶O¹⁸O in the 4.3-μm region

Mark P. Esplin, Ronald J. Huppi, and George A. Vanasse
Appl. Opt. 21(9) 1681-1685 (1982)

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Measurement of the NH₃, CCl₂F₂, CHClF₂, CFCl₃, and CClF₃ absorption coefficients at isotopic ¹³C¹⁶O₂ laser wavelengths by photoacoustic spectroscopy

Zdeněk Zelinger, Ivan Jančik, and Pavel Engst
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Molecular frequency reference at 1.56  μm using a ¹²C¹⁶O overtone transition with the noise-immune cavity-enhanced optical heterodyne molecular spectroscopy method

Shailendhar Saraf, Paul Berceau, Alberto Stochino, Robert Byer, and John Lipa
Opt. Lett. 41(10) 2189-2192 (2016)

Observations and calculations of ¹²C¹⁶O₂ perpendicular band intensities in the 13-μm region

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Appl. Opt. 29(16) 2474-2477 (1990)