Temperature Classification of Samarium Lines

Abstract

view Abstract Citations (13) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Temperature Classification of Samarium Lines King, Arthur S. Abstract A temperature classification is given for ~iç~ samarium lines between X 2900 and X 8700. About 2800 of these belong to Sa I and ~2 fall into classes I and II, furnishing the basis for a term analysis. As with other rare earths, the furnace was highly effective in developing lines of the neutral spectrum, many of which are faint in the arc, and also gave the more sensitive lines of Sa ii, recognized through the comparison of furnace spectra with those of the arc and spark. Wave-lengths of the neutral lines were meas- ured in the furnace, a large proportion being new, and a checking of the earlier meas- ures of Sa II resulted in improved values in many cases, especially when close blends with neutral lines occur. In the arc, the relative strengths of the Sa i and Sa n spectra appeared to depend on the intensity of vaporization, governing the frequency of ionic combination. A strong ultra-violet spectrum peculiar to the spark probably arises from Sam. The doublet structure of many samarium lines, especially those of Sa ii, is described and measurements are given for the lines most clearly resolved. The explanation of this effect, probably a combination of isotope displacement and hyperfine structure, must await examination under high resolution Publication: The Astrophysical Journal Pub Date: September 1935 DOI: 10.1086/143664 Bibcode: 1935ApJ....82..140K full text sources ADS | Related Materials (1) Reprint: 1935CMWCI.523....1K