Arc Spectrum of Germanium*†

Abstract
The arc spectrum of germanium has been investigated in the region 1546 A to 11 252 A with concave grating spectrographs and interferometers by the use of various arc and hollow cathode sources. Wavelength measurements supplied by other laboratories are included. The wavelength material has been greatly improved and extended from 184 lines to 475 lines. Of these about 200 visible and infrared lines were found by the development of a special low pressure Ge arc source.
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