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Infrared Spectra and Band Strengths of CH3SH, an Interstellar MoleculeThree solid phases of CH3SH (methanethiol or methyl mercaptan) have been prepared and their mid-infrared spectra recorded at 10-110 degrees Kelvin, with an emphasis on the 17-100 degrees Kelvin region. Refractive indices have been measured at two temperatures and used to estimate ice densities and infrared band strengths. Vapor pressures for the two crystalline phases of CH3SH at 110 degrees Kelvin are estimated. The behavior of amorphous CH3SH on warming is presented and discussed in terms of Ostwald's step rule. Comparisons to CH3OH under similar conditions are made, and some inconsistencies and ambiguities in the CH3SH literature are examined and corrected.
Document ID
20170002684
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hudson, R. L. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
March 29, 2017
Publication Date
September 6, 2016
Publication Information
Publication: Physical Chemistry Chemical Physics
Volume: 18
Issue: 36
ISSN: 1463-9076
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN40209
Distribution Limits
Public
Copyright
Other
Keywords
Astrochemistry