Abstract
T distribution of the rotational spectrum of the electron-beam-induced (0-0) vibrational transition in nitrogen can be used to infer the local rotational temperature. The first work to give a complete model for the excitation deexcitation process was that of Muntz. This model was discussed by Robben and Talbot and it was pointed out that the spectrally determined temperature appeared to be always greater than the predicted local translational temperature in both freejet expansions and in nozzles. Because of the, importance of the measurement, considerable interest has centered on this discrepancy. In a recent Note, Tirumalesa has compared computed rotational temperatures in a freejet of nitrogen to the measured values obtained by Robben and Talbot and Marrone. It should be'observed that apparent typographical errors and/or nomenclature inconsistencies exist in the Note in Eqs. (5 and 8-10). The relaxation model used in the Note is
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