OSA's Digital Library

Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 13, Iss. 6 — Dec. 1, 1926
  • pp: 651–660

MEASUREMENTS OF THERMOPHOSPHORESCENCE OF GLASS PRODUCED BY RADIUM RADIATION

R. E. NYSWANDER and S. C. LIND

JOSA, Vol. 13, Issue 6, pp. 651-660 (1926)
http://dx.doi.org/10.1364/JOSA.13.000651


View Full Text Article

Acrobat PDF (609 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

<i>Thermophosphorescence of glass colored violet by previous exposure to radium emanation</i>. (1) Visible light emitted by the glass when heated to temperatures around 115° to 255° C was measured with a polarization photometer, using radium luminous paint as comparison source. The total quantity of light emitted by equal areas of similarly radiated glass of the same thickness was found by integration of the curves to be constant, independent of the temperature or rate of light emission. The rate of decrease of light intensity at constant temperature approximately fits the equation for second order chemical reaction <i>dx/dt</i>=<i>k</i>(<i>a</i>-<i>x</i>)<sup>2</sup>. The values of the velocity constant <i>k</i> increase with temperature in accordance with the van’t Hoff equation log <i>K</i>=<i>C</i>-<i>a</i>/<i>T</i>. The temperature coefficient is somewhat lower than that characteristic of chemical reaction but higher than for most purely physical reactions. (2) <i>Heat radiation</i>. Measurements made with a Coblentz silver-bismuth thermopile failed to detect any increased heat radiation accomanying the luminescence.

Citation
R. E. NYSWANDER and S. C. LIND, "MEASUREMENTS OF THERMOPHOSPHORESCENCE OF GLASS PRODUCED BY RADIUM RADIATION," J. Opt. Soc. Am. 13, 651-660 (1926)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-13-6-651


Sort:  Journal  |  Reset

References

  1. Abstracted in the Physical Review, 23, p. 296; 1924.
  2. Meyer and Przibram, Sitz. Akad. Wiss. Wien, 121 (IIa), p. 1414; 1912.
  3. Lind, Jour. Phys. Chem., 24, p. 437; 1920.
  4. Clarke, Phil. Mag., 45, p. 268, p. 735; 1923.
  5. Coblentz, Bull. Bu. Stds., 9, p. 7; 1913.
  6. Amberson, Journ. Gen. Physiol. 4, p. 517, p. 535; 1922.
  7. For a complete derivation, see Nernst's Theoretical Chemistry, fourth English Edition, p. 718; 1916.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited