Abstract
Direct absorption. measurements using Frequency. Modulation. Spectroscopy (FMS) have been made. Simple calibration is possible and DC absorptions as small as 1.4x10-4 may be detected. By modulating the absorption photochemically, the sensitivity may be extended to a lower limit of1.5x10-7. The radicals HCO1 and ND4 have been studied using this method.
Original language | English |
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Pages (from-to) | 81-86 |
Number of pages | 6 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 426 |
DOIs | |
State | Published - 19 Oct 1983 |