Absorption spectra of solids condensed at low temperatures from electric discharges
Abstract
Products of electric discharges in gases have been condensed on surfaces cooled by liquid helium. Such films of nitrogen, hydrogen, oxygen, water vapor, and ammonia have been studied by absorption spectroscopy over the spectrum rnage 0.22 to 3.5 microns. In nitrogen, two very weak absorption bands are observed near 3400 A. Hydrogen shows no absorption, but does show a very weak green emission in the gas surrounding the cold surface. In oxygen 24 bands are observed in the visible portion of the spectrum, and two in the infrared. Preliminary observations on absorption in water vapor and ammonia are described. In addition, the spectrum has been photographed of the green emission produced by ammonia discharge products condensed on a surface at 77°K.
- Publication:
-
Journal of Molecular Spectroscopy
- Pub Date:
- 1958
- DOI:
- 10.1016/0022-2852(58)90058-4
- Bibcode:
- 1958JMoSp...2...42B