Abstract
In the course of an investigation on the spectra of the halogens and other substances excited by active nitrogen, Strutt and Fowler (1912) observed that, when bromine was admitted into the glowing nitrogen, a feeble orange luminosity was developed. Visual observation with a spectroscope revealed eight narrow bands in the orange region of the spectrum, at intervals of about 28 A. In addition to these bands, a broad symmetrical band with ill-defined edges at 2930 and 2890 A was photographed. This work does not appear to have been followed up.' As the apparatus used for a recent similar investigation with chlorine was available (Cameron and Elliott 1938), it seemed worth while attempting to photograph the orange bands with the rapid panchromatic material now available. This attempt has proved successful, and the results will now be described.
Reference3 articles.
1. Proc. Roy;Cameron W. H. B.;Soc. A,1938
2. Proc. Roy;Strutt R.;Soc. A,1917
3. Proc. Roy;Strutt R. J.;Soc. A,1912
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