How to analyze the optical spectra of Argon jet?

01 January 1970 0 3K Report

I have optical spectra data for atmospheric pressure Argon jet and below is the graph for the section of Argon I lines. But I am not sure how to start analyzing. I found a pdf online for NIST database but the wavelength value for the peak in my data are not mentioned in the database. How do I find the transition probability,statistical weight etc required for the lines intensity ratio method?

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