Some Studies in the Stark Effect for the Diffuse Lines of Silver and Lithium

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Abstract
The Stark effects on the 5P22−6D2 and 5P12−6D2 groups of silver lines were studied experimentally in some detail by the Lo Surdo method. In the 5P22−6D2 group the violet s-component was split into two branches, the strong outer one being designated the D32 branch and the weak inner one the F branch. The red s-component had only one branch, that being designated the D22 branch. Both the violet and red p-components showed only one branch, the D32 violet and D22 red branch. In the 5D12−6D2 group the violet s-component was also split into two branches, the strong inner one being designated the F branch and the weak outer one the G branch. The single red s-component was designated as the D22 branch. Both the violet and red p-component had only a single branch, the violet F and the red D22 branch. These results fit better the assignment of Fujioka and Nakamura1 than did the previous results of Takamine.2 Microphotometer prints were made from the photographic plates, and the measurements by this method agree closely with direct measurements from the plates. In the lithium spectrum the line λ4602.51A, was resolved into three s- and three p-components in an electric field, with the violet side having a stronger outer and a weaker inner component for the p-vibration; and a weaker outer and a stronger inner component for the s-vibration. These results are similar to those of Poirot3 and Lüssem,4 obtained by other methods, with the addition of relations between displacements in angstroms and the field strengths. The line λ4132.93 was resolved into three s- and three p-components, similar to the results of Yoshida.5

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