DETERMINATION OF INTENSITIES OF THE B-1-P I(U)-]X(1)SIGMA(-2 BY DENSITOMETRY ON PHOTOGRAPHIC PLATE - COMPARISON WITH THEORETICAL RESULTS AND EXPERIMENTAL RESULTS OBTAINED FROM PHOTOELECTRIC DEVICES()(G) BAND SYSTEM OF NA)

The photoelectric recording of the spectra is the usual method for det ermining fluorescence intensities. This, however, requires the previou s calibration of the response of the photoelectric device to correct t he intensity of the primary spectra. For this correction a lamp with a well known spectral irradiance is normally used. In this work a proce dure for obtaining calibrated experimental intensities on photographic plate is described. This procedure is based on the sensitometric prop erties of photographic material. A comparison between radiative transi tion probabilities (theoretical values) obtained in this work and our experimental intensity values is shown for the most intense fluorescen ce series of a sample of sodium vapor, induced by 4765 and 4880 Angstr om argon-ion laser lines. Also this comparison is made with corrected experimental values obtained by using photoelectrical redording. In bo th cases, a good agreement with their corresponding theoretical terms is observed.