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Boltzmann spectral distribution or “infrared catastrophe” in the resonance radiation of a gas

  • Atoms, Spectra and Radiation
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Abstract

The purely thermal infrared emission spectra of a resonance medium (sodium vapor) are investigated experimentally. It is shown that the emission intensity in the 2–3 μm range at temperatures of 600–1200 K is several orders of magnitude higher than the intensity obtained from the standard theory of resonance radiation transfer. This phenomenon can be conventionally termed an “infrared catastrophe.” The form of the recorded spectra and the absolute intensity of the emission in both the infrared and visible regions of the spectrum are in agreement with the theory developed by Yu. L. Zemtsov and A. M. Starostin, Zh. Éksp. Teor. Fiz. 103, 345 (1993) [JETP 76, 186 (1993)], in which the Boltzmann spectral distribution of the population of the resonance level is proportional to exp(−ħω/T).

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Authors and Affiliations

  1. Troitsk Institute of Innovational and Thermonuclear Research, 142092, Troitsk, Moscow Region, Russia

    Yu. K. Zemtsov, A. Yu. Sechin & A. N. Starostin

  2. Moscow Physicotechnical Institute, 141700, Dolgoprudnyi, Moscow Region, Russia

    A. G. Leonov & D. I. Chekhov

Authors
  1. Yu. K. Zemtsov
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  2. A. Yu. Sechin
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  3. A. N. Starostin
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  4. A. G. Leonov
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  5. D. I. Chekhov
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Additional information

Pis’ma Zh. Éksp. Teor. Fiz. 65, No. 11, 807–811 (10 June 1997)

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Zemtsov, Y.K., Sechin, A.Y., Starostin, A.N. et al. Boltzmann spectral distribution or “infrared catastrophe” in the resonance radiation of a gas. Jetp Lett. 65, 839–844 (1997). https://doi.org/10.1134/1.567434

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  • DOI: https://doi.org/10.1134/1.567434

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