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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 922–930

Complex refractive index of ammonium nitrate in the 2–20-μm spectral range

Maurice A. Jarzembski, Mark L. Norman, Kirk A. Fuller, Vandana Srivastava, and Dean R. Cutten  »View Author Affiliations


Applied Optics, Vol. 42, Issue 6, pp. 922-930 (2003)
http://dx.doi.org/10.1364/AO.42.000922


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Abstract

Using high-resolution Fourier-transform infrared absorbance and transmittance spectral data for ammonium sulfate (AMS), calcium carbonate (CAC), and ammonium nitrate (AMN), we made comparisons with previously published complex refractive-index data for AMS and CAC to infer experimental parameters to determine the imaginary refractive index for AMN in the infrared wavelength range from 2 to 20 μm. Subtractive Kramers-Kronig mathematical relations were applied to calculate the real refractive index for the three compositions. Excellent agreement for AMS and CAC with the published values was found, validating the complex refractive index obtained for AMN. We performed backscatter calculations using a log-normal size distribution for AMS, AMN, and CAC aerosols to show differences in their backscattered spectra.

© 2003 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.3030) Scattering : Index measurements
(300.0300) Spectroscopy : Spectroscopy
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: May 3, 2002
Revised Manuscript: October 25, 2002
Published: February 20, 2003

Citation
Maurice A. Jarzembski, Mark L. Norman, Kirk A. Fuller, Vandana Srivastava, and Dean R. Cutten, "Complex refractive index of ammonium nitrate in the 2–20-μm spectral range," Appl. Opt. 42, 922-930 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-6-922


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