Additional Shock-Tube Measurements of Absolute CR i gƒ-VALUES

Absolute gf-values for eighty-six Cr i lines have been determined from emission of shock-heated gas mixtures. The present work is a continuation of a previous paper, which reported gf-values for forty-one Cr i and two Cr it lines. Our results show disagreements ranging from a few percent to factors of 10 or more when compared with the arc values of Corliss and Bozman. The magnitude of the discrepancies appears to be dependent upon both wavelength and upper excitation potential. Comparison of our values with those of other investigators indicates that reported absolute gf-values of low-excitation Cr i lines are probably accurate to within ± 25 percent, but gf-values of high-excitation lines are still uncer~ tam by an average factor of about 4