Detection of NO traces Using resonantly enhanced multiphoton ionization: A method for monitoring atmospheric pollutants |
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| Authors: | S Guizard D Chapoulard M Horani D Gauyacq |
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| Institution: | (1) Laboratoire de Photophysique Moléculaire du CNRS, Université de Paris-Sud, Bât 213, F-91405 Orsay Cedex, France |
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| Abstract: | Resonantly enhanced multiphoton ionization (REMPI) is proposed as an ultrasensitive detection method forreal-time monitoring of atmospheric pollutants in situ. The technique is demonstrated in the laboratory for NO diluted in pure nitrogen at 560 mbar. The MPI current resulting from (2+1) photon ionization of NO via the resonantC
2
H (v=0) state has been measured for several NO concentrations. Detection levels as low as 50 ppt have been obtained.Laboratoire associé à l'Université de Paris-Sud |
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| Keywords: | 33 80 Rv 42 68 |
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