Temperature-Dependent Far-Infrared Spectra of Single Crystals of High Explosives Using Terahertz Time-Domain Spectroscopy
- 25 March 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry A
- Vol. 109 (15) , 3501-3505
- https://doi.org/10.1021/jp044384h
Abstract
Survey spectra of single-crystal HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine), RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), and PETN (pentaerythritol tetranitrate) were acquired in the region from 10 to 80 cm-1 using terahertz time-domain spectroscopy. The spectra were taken at temperatures ranging from 8.4 to 300 K. Generally, the spectra show multiple absorption peaks in the range 50−80 cm-1, with PETN (110) showing strong absorption features at room temperature. RDX (210) is the most notable in the region 10−40 cm-1, showing multiple spectral features, while HMX (010) shows a very broad absorption at 47.8 cm-1 with a fwhm of 37.3 cm-1. Future plans include polarization-dependent investigations for multiple crystallographic orientations over an increased spectral range and higher-level theoretical calculations.Keywords
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