Publication
- Names
-
- R. K. Khanna
- M. J. Ospina
- G. Zhao
- Title
- Infrared band extinctions and complex refractive indices of crystalline $C_2H_2$ and $C_4H_2$
- Abstract
- Infrared absorption intensities of thin films of crystalline $C_2H_2$ and $C_4H_2$ at 70K are reported for the characteristic features of these materials in the thermal infrared region (2-50 μm). In order to determine the complex refractive indices (n and k) the reflection at the interfaces and the true absorption by the film deposited on a nonabsorbing substrate are separated by analyzing the ratio of transmission spectra for two sample thicknesses. This results in a significant simplification of the iteration process required to obtain n and k by the Kramers-Kronig analysis of the extinction data. The laboratory-determined values of n and k reproduce the observed transmission for a given sample thickness to within $\pm5%$ in most cases.
- Keywords
- spectroscopy, transmission spectra, optical constants, band position, band vibration mode, band integrated intensity, band strength, mid-IR, near-IR, molecular solid, C2H2, C4H2, Acetylene, Infrared Absorption, Kramers-Kronig Formula, Planetary Radiation, Thermal Emission, Titan, Infrared Spectra, Iris Satellites, Low Temperature, Natural Satellites, Vapor Phases, Vibrational Spectra, Atomic and Molecular Physics, Earth Science, Earth Science
- Content
- spectral data, band list data, experimental physics
- Document type
- article
- Publication state
- published
- Doi
- 10.1016/0019-1035(88)90062-0
- Identifiers
-
- bibcode: 1988Icar...73..527K