Abstract

The determination of the rotational temperature in nitrogen using measurements of electron beam-induced fluorescence, depends upon the formulation employed to calculate the temperature from the spectral data as well as upon the resolution of the spectrometer. The errors introduced in the measurements by the use of the prevalent forced semilogarithmic data analysis and by incomplete resolution of the rotational lines are examined and evaluated. An alternative method of data analysis is presented. When the errors are accounted for, the dependence of the measured temperature on the number of rotational lines used in the analysis is eliminated, and the apparent rotational temperature becomes less dependent upon the gas density and the true gas temperature.

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