Th e temperat ure of a copper a rc in air h as been m easured by co mparing 31 sets of tr a nsition probabilities for spectra of 20 elements with sp ectral-line inte nsities fr oln t hose ele me nts separately a dd ed to t h e copper.The intensities are taken fr om the rece ntly publish ed NBS T ables of Spectral-line Intensities and t he transition probabilities from t h e literature.The individual determinations are discussed .Th e set of determinations is shown to follow a Gaussian distribution abou t a m ean of 5100 OK .The average deviation of the determin at ions is 470 OK a nd t he standard deviation of t he m ean is 110 O K.This tem perat ure m ay be used in t h e evaluation of t housands of atomic transition proba bilities from the intensities in t he n ew tables.The effect of the uncer tain ty in t he temperature on d eri veel t ransition proba bilities is evaluated as a fun ction of excitation potential.
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Charles Corliss (1962) studied this question.