Hydrogen bands in the ultra-violet Lyman region

Author:

Abstract

In the course of an investigation on the spectra of certain light elements in the region 2000 Å to 900 Å, some bands due to hydrogen were observed. The bands have, as far as I know, not been described before, although some of the stronger lines have been measured by Lyman and given as lines probably belonging to hydrogen. On the reproduction in a later paper by Lyman, the stronger lines of the bands can be seen. The discharge tube was of a special type, being constructed for the investigation of the spectra of easily evaporating metals and other substances. The discharge usually took place inside a molybdenum box, along the axis of which is suspended a heated tungsten wire. Currents up to 2 amps, can pass through the gas from the tungsten wire to the sides of the molybdenum box under varying potentials, from a few volts up to about 400 volts. The pressure of the gas (or vapour) inside the discharge box was of the order of 0.1 mm.

Publisher

The Royal Society

Subject

General Medicine

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