科研之友
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摘要
The concept of the Allan variance has been utilized to test the detection abilities of two powerful experimental methods for trace gas monitoring: IR diode-laser and CO2 laser photo-acoustic spectroscopy. The detection of stable molecules (OCS, allene, CH3OH), and unstable species (ozone, short-lived free radical CN and molecular ion ArD+) have been compared. An approach for studies of the influence of the reactivity on the optimal averaging time for the minimum detectable concentration is demonstrated.
- 出版日期2009-7
