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International Journal of Spectroscopy
Volume 2012 (2012), Article ID 953019, 4 pages
Research Article

Vibrational Spectrum of HMX at CO2 Laser Wavelengths: A Combined DRIFT and LPAS Study

1Diagnostics and Metrology Laboratory UTAPRAD-DIM, ENEA Research Center, Via Enrico Fermi 45, 00044 Frascati, Rome, Italy
2Department of Chemistry, Institute of Nanostructured Materials (ISMN-CNR), Sapienza University of Rome, P. le A. Moro 5, 00185 Rome, Italy

Received 21 June 2012; Revised 20 July 2012; Accepted 28 July 2012

Academic Editor: Ahmed Aamouche

Copyright © 2012 A. Puiu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The vibrational spectrum of solid standard HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) was investigated. Two spectroscopic techniques were adopted for their different sensitivity and resolution. A preliminary survey of the absorption bands of the compound was performed in the 8000–400 cm−1 spectral range by employing the diffuse reflectance infrared Fourier transform (DRIFT) technique at room temperature. The high-resolution line spectrum of HMX was obtained in the 9.2–10.8 μm spectral range by laser photoacoustic spectroscopy (LPAS) method, using a line tuneable 10 W stabilised cw CO2 laser light source. By comparing the data collected with the two techniques in the common frequency range, a very good agreement was observed.