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Investigations in the Spectral Region between 20 and 40μ

Strong, John (1931) Investigations in the Spectral Region between 20 and 40μ. Physical Review, 37 (12). pp. 1565-1572. ISSN 0031-899X. doi:10.1103/PhysRev.37.1565.

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An apparatus is described which is convenient for studying the optical properties of substances with reststrahlen having wave-lengths from 6 to 150μ. A vibrationless support is described, the essential features of which are copied from the design of R. Müller but the construction is simplified. The transmission of several gases was studied with reststrahlen having wave-lengths 20 to 33μ. SO_2 shows strong absorption at 20.75μ. The reflectivity of SO_2 was tested and found to be zero at both 20.75μ and 8.7μ where it has strong absorption bands. Gas absorptions from 20 to 33μ are compared with the Raman indications. Transmissivities and reflectivities of various materials are given for the spectral region 20 to 33μ. β−MgO was found to have a reststrahlen near 23μ. Potassium iodide was found to be transparent to wave-lengths greater than 33μ.

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Additional Information:© 1931 The American Physical Society. Received 5 May 1931. Published in the issue dated June 1931. National Research Fellow.
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National Research CouncilUNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20140917-134811823
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49791
Deposited By: Tony Diaz
Deposited On:18 Sep 2014 02:52
Last Modified:10 Nov 2021 18:48

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