An Approximation to True Peak Absorbance from Observed Peak Absorbance for Gas Phase Fourier Transform Spectroscopy

Abstract

An approximation is developed to yield true peak absorbance, A sub p, from observed peak absorbance, A sub obs, from gas phase infrared spectra obtained using low resolution Fourier transform spectroscopy employing triangular apodization of the interferogram. The approximation is of the form A sub p = k((A sub obs) ot the l power)(rho to the n power), where k, 1, and n constants and rho is equal to the ratio of the resolution of the instrument to twice the half width at half height of the absorbing line. Values of k, 1, and n are given as a function of A sub p and instrument resolution. Comparison is made with a previous approximation. Keywords: Peak absorbance correction, Gas phase, Low resolution, Absorption.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1990
Accession Number
ADA228357

Entities

People

  • Kevin L. McNesby
  • Robert A. Fifer

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Abstracts
  • Air Force
  • Army Aviation
  • Chemical Engineering
  • Chemistry
  • Engineering
  • Engineers
  • Jet Propulsion
  • Low Resolution
  • Mechanical Engineering
  • Military Research
  • Numerical Integration
  • Spectra
  • Spectroscopy
  • Standards

Fields of Study

  • Physics

Readers

  • Microwave Engineering.
  • Spectroscopy.