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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 11, Iss. 1 — Jan. 1, 1972
  • pp: 142–147

Variation of Single Particle Mid-Infrared Emission Spectrum with Particle Size

G. R. Hunt and L. M. Logan  »View Author Affiliations


Applied Optics, Vol. 11, Issue 1, pp. 142-147 (1972)
http://dx.doi.org/10.1364/AO.11.000142


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Abstract

The emission spectra of single particles of inorganic solids as a function of particle size have been recorded from 6 μ to 11.8 μ. For small optically thin particles, an emission maximum is produced in the reststrahlen region. The emission behavior is dominated by scattering and can be adequately described in terms of Mie absorption efficiency factors. As the particle size is increased, the emission band reverses its polarity, and the spectrum approaches that of a polished plate. The data provide source functions necessary for determining the emission behavior of particulate samples in which temperature gradients exist, such as on the lunar surface. The data are of particular interest for interpreting the spectral behavior of circumstellar silicate particles.

© 1972 Optical Society of America

History
Original Manuscript: July 16, 1971
Published: January 1, 1972

Citation
G. R. Hunt and L. M. Logan, "Variation of Single Particle Mid-Infrared Emission Spectrum with Particle Size," Appl. Opt. 11, 142-147 (1972)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-11-1-142

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