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An Improved Description of Technetium Spectra (Tc i and Tc ii), 2000 to 9000 Å
W R Bozman1, W F Meggers1, C H Corliss1
1Institute for Basic Standards, National Bureau of Standards, Washington, D.C. 20234.
Abstract:
A new description of technetium spectra has been made that is more complete and provides more accurate data on wavelengths than those reported heretofore. The observations were made in the region 2000 to 9000 Å with arc and spark sources. Larger samples of technetium and spectrographs of higher resolution were used and the number of lines reported (4500) is more than doubled. The intensities are estimated over a range from 1 to 20,000 and the relative strengths in arc and spark permit assignment of the origin of the lines to neutral atoms (3300 lines) or ions (1200 lines).
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