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This article is cited in 14 scientific papers (total in 15 papers)
Laser spectroscopy
Measurement of the concentration ratio for 13С and 12С isotopes at atmospheric pressure by carbon dioxide absorption of diode laser radiation at ~2 μm
E. S. Mironchuka, I. V. Nikolaevb, V. N. Ochkinb, S. S. Rodionovab, M. V. Spiridonovb, S. N. Tskhaib a Institute of Physics, National Academy of Sciences of Ukraine, Kiev
b P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow
Abstract:
The ratio of 12СO2 and 13CO2 concentrations in the human exhaled air is measured by the method of diode laser spectroscopy using a three-channel optical scheme and multipass cell. Unlike the previous measurements in the spectral range of ~4.3 μm with a resolved rotational structure at low pressure of selected samples, the present measurements are performed in the range of ~2 μm, in which weaker absorption bands of CO2 reside. In this case, it is possible to employ lasers and photodetectors operating at room temperature. The thorough simulation of the spectrum with collisional broadening of lines and employment of regression analysis allow one to take measurements at atmospheric pressure with the accuracy of ~0.04%, which satisfies the requirements to medical diagnostics of ulcers.
Received: 02.04.2008 Revised: 19.09.2008
Citation:
E. S. Mironchuk, I. V. Nikolaev, V. N. Ochkin, S. S. Rodionova, M. V. Spiridonov, S. N. Tskhai, “Measurement of the concentration ratio for 13С and 12С isotopes at atmospheric pressure by carbon dioxide absorption of diode laser radiation at ~2 μm”, Kvantovaya Elektronika, 39:4 (2009), 388–391 [Quantum Electron., 39:4 (2009), 388–391]
Linking options:
https://www.mathnet.ru/eng/qe13865 https://www.mathnet.ru/eng/qe/v39/i4/p388
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