Open AccessSecond spectrum of tungsten (W II)
Author(s) -
Donald D. Laun
Publication year - 1964
Publication title -
journal of research of the national bureau of standards. section a. physics and chemistry
Language(s) - English
Resource type - Journals
eISSN - 2376-5704
pISSN - 0022-4332
DOI - 10.6028/jres.068a.021
Subject(s) - ranging , tungsten , wavelength , coupling (piping) , ion , physics , energy spectrum , atomic physics , spectrum (functional analysis) , broad spectrum , electron , ground state , materials science , chemistry , optics , nuclear physics , telecommunications , quantum mechanics , computer science , metallurgy , combinatorial chemistry
A preliminary report on the second spectrum of tungsten, published in 1938, presented 27 even energy levels and 50 odd energy levels that were derived from 500 W II lines ranging in wavelength from 1961.43 Å to 4348.13 Å. The present paper submits data on 62 even levels, 132 odd levels, and 2,173 classified lines of W II, ranging in wavelength from 1756.6 Å to 6219.77 Å. The ground state of the W + ion is represented by the 6 D 0½ level of a sextet D term arising from the 5 d 4 6 s 1 electron configuration, but the level intervals and magnetic splitting factors indicate considerable departure from LS -coupling, suggesting that coupling intermediate between LS and Jj may be more appropriate for the spectrum W II.