Relative A values of 131 W I and 116 W II lines were measured in emission using a gas-driven shock tube as the spectroscopic source. Estimated accuracy of the relative data (3150–5600 Å) for each ionization stage is 6–50%. The ratio of ionic-to-neutral line strengths was determined within 30%. Wavelengths of 40 tungsten lines (3400–5300 Å) prominent in 1-eV plasmas, but not reported heretofore, were measured with typical reliability of ± 0.2 Å. Experimental W I line strengths are compared with data of Corliss and Bozman and trends of disagreement are examined.
Joseph E. Clawson and Myron H. Miller, "Experimental transition probabilities for neutral and singly ionized tungsten," J. Opt. Soc. Am. 63, 1598-1603 (1973)