Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Absorption and Resonance of the Helium Infrared Lines

Absorption and Resonance of the Helium Infrared Lines The absorption of helium excited at low voltages for its own lines, the 2 S 3 - 2 P 3 at 10830A and the 2 S 1 - 2 P 1 at 20582A, is determined. The percentage absorption of the 2 S 3 - 2 P 3 line increases when either the exciting current or the pressure in the absorbing tube is increased, and also when either the current or the pressure in the source tube is decreased. When the light to be absorbed is taken end on from a Geissler tube source, the percentage absorption is much less than when the light is taken off at right angles to the capillary. The changes with source tube conditions are ascribed to the corresponding variations of the shape and width of the emission line. Observable absorption begins when the exciting voltage is 25 volts. No absorption is detected at 19.8 volts, the excitation potential of the 2 S 3 state. The 10830A line shows strong resonance which is directly proportional to the percentage absorption. The absorption for the 20582A line is very small. It shows no detectable resonance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review American Physical Society (APS)

Absorption and Resonance of the Helium Infrared Lines

Physical Review , Volume 39 (5) – Mar 1, 1932
6 pages

Loading next page...
 
/lp/american-physical-society-aps/absorption-and-resonance-of-the-helium-infrared-lines-jupoG980l0

References

References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.

Publisher
American Physical Society (APS)
Copyright
Copyright © 1932 The American Physical Society
ISSN
1536-6065
DOI
10.1103/PhysRev.39.796
Publisher site
See Article on Publisher Site

Abstract

The absorption of helium excited at low voltages for its own lines, the 2 S 3 - 2 P 3 at 10830A and the 2 S 1 - 2 P 1 at 20582A, is determined. The percentage absorption of the 2 S 3 - 2 P 3 line increases when either the exciting current or the pressure in the absorbing tube is increased, and also when either the current or the pressure in the source tube is decreased. When the light to be absorbed is taken end on from a Geissler tube source, the percentage absorption is much less than when the light is taken off at right angles to the capillary. The changes with source tube conditions are ascribed to the corresponding variations of the shape and width of the emission line. Observable absorption begins when the exciting voltage is 25 volts. No absorption is detected at 19.8 volts, the excitation potential of the 2 S 3 state. The 10830A line shows strong resonance which is directly proportional to the percentage absorption. The absorption for the 20582A line is very small. It shows no detectable resonance.

Journal

Physical ReviewAmerican Physical Society (APS)

Published: Mar 1, 1932

There are no references for this article.