التفاصيل البيبلوغرافية
| العنوان: |
Laser induced fluorescence measurements of microwave stimulated OH molecules from H2O photodissociation. |
| المؤلفون: |
Wurps, H., Spiecker, H., ter Meulen, J. J., Andresen, P. |
| المصدر: |
Journal of Chemical Physics; 8/15/1996, Vol. 105 Issue 7, p2654, 6p |
| مصطلحات موضوعية: |
FLUORESCENCE, PHOTODISSOCIATION, ASTRONOMICAL masers |
| مستخلص: |
Laser induced fluorescence of microwave stimulated OH molecules from H[SUP2]O photodissociation is investigated as a first step in a series of laboratory experiments to understand features of astronomical OH masers. The inversion between the Π[SUB3/2], J = 7/2 Λ-doublet states of OH generated via photodissociation of cold H[SUP2]O at 157 nm is shown to be 1.8:1. Within a microwave, Fabry--Perot cavity tuned to the resonance of one of the main hyperfine transitions in this Λ doublet it is possible to stimulate all inverted OH molecules. The linewidth of the two main microwave transitions is measured as a function of the microwave power and interaction time. The results show that Doppler broadening is negligible at short interaction times of the molecules with the microwave field. [ABSTRACT FROM AUTHOR] |
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