Knowledge Bank

The pressure broadeninig of the $J=9/2,F=4\to$ 4 and $F=5\to 5$ A doubling transitions of the OH radical in the $\mathrm{<mrow\; data-mjx-texclass="ORD">2</mrow>}M3/2$ state has been investigated with a source modulation spectrometer. Results are given for collisions with foreign gases $NO2$ and $H2O$. Experimental problems of such measurements, caused essentially by the rather complex mixture composition, are discussed.