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Proceedings Paper

Optical constants of neat liquid-chemical warfare agents and related materials measured by infrared spectroscopic ellipsometry
Author(s): C.S.-C. Yang; B. R. Williams; M. S. Hulet; T. E. Tiwald; R. W. Miles; A. C. Samuels
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Paper Abstract

We studied various liquids using a vertical attenuated total reflection (ATR) liquid sampling assembly in conjunction with Infrared Variable Angle Spectroscopic Ellipsometry (IR-VASE), to determine the infrared optical constants of several bulk liquids related to chemical warfare. The index of refraction, n, and the extinction coefficient, k, of isopropyl methylphosphonofluoridate (Sarin or GB), isopropyl alcohol (IPA) (a precursor of GB), and dimethyl methylphosphonate (DMMP)-a commonly employed simulant for GB, measured by our vertical ATR IR-VASE setup are closely matched to those found in other studies. We also report the optical constants of cyclohexyl methylphosphonofluoridate (GF), 2-(diisopropylamino)ethyl methylphosphonothioate (VX), bis-(2-chloroethyl) sulfide (HD), and 2-chlorovinyl dichloroarsine (L, Lewisite). The ATR IR-VASE technique affords an accurate measurement of the optical constants of these hazardous compounds.

Paper Details

Date Published: 4 June 2011
PDF: 8 pages
Proc. SPIE 8018, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII, 80180M (4 June 2011); doi: 10.1117/12.882067
Show Author Affiliations
C.S.-C. Yang, Battelle Eastern Science and Technology Ctr. (United States)
B. R. Williams, Science Applications International Corp. (United States)
M. S. Hulet, Science Applications International Corp. (United States)
T. E. Tiwald, J.A. Woollam, Inc. (United States)
R. W. Miles, U.S. Army Edgewood Chemical Biological Ctr. (United States)
A. C. Samuels, U.S. Army Edgewood Chemical Biological Ctr. (United States)


Published in SPIE Proceedings Vol. 8018:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XII
Augustus W. Fountain; Patrick J. Gardner, Editor(s)

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