A nomograph for finding the Doppler linewidth in terms of a given wavelength, temperature, and atomic mass is described. For a more accurate evaluation in terms of elemental atomic number <i>Z</i>, a table of constants is provided.
S. O. Kastner, "Nomograph and table for Doppler linewidths," J. Opt. Soc. Am. 70, 1371-1372 (1980)