Measurement of the Hanle Effect for the OH Radical

Details Measurement of the Hanle Effect for the OH Radical Measurement of the Hanle Effect for the OH Radical

Oct 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969phrv..186....9g&link_type=abstract

Physical Review, vol. 186, Issue 1, pp. 9-13

Physics

10

Scientific paper

We have used the coincidence of the Zn I 3072.06 Å line with the R12(1) line of the (0, 0) band in the OH A2Σ+-X2Π ultraviolet system to perform a measurement of the molecular Hanle effect on the K'=2, J'=32 rotational level of the excited state. The OH was formed by the reaction H + NO2 --> OH + NO, and the Hanle linewidth is extrapolated to zero pressure of H2 and NO2. The half-width is found to be 258 +/- 36 mG and the pressure broadening of the linewidth corresponds to 13 +/- 7 mG/m Torr of NO2 pressure and 5.2 +/- 0.8 mG/m Torr of H2 pressure. This linewidth gives a value of gτ=(2.20+/-0.27)×10-7 sec for this excited state of the OH molecule.

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