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Vibrational Energy Transfer in High Explosives: Nitromethane

Published online by Cambridge University Press:  10 February 2011

Xiaoyu Hong ,
Jeffrey R. Hill  and
Dana D. Dlott
Xiaoyu Hong
Affiliation:
School of Chemical Sciences, University of Illinois, Urbana, IL 61801, Correspondence to Dana D.Dlott, Box 37 Noyes Lab, 505 S. Mathews Ave., Urbana, IL 61801, d-dlott @ UIUC.EDU
Jeffrey R. Hill
Affiliation:
School of Chemical Sciences, University of Illinois, Urbana, IL 61801, Correspondence to Dana D.Dlott, Box 37 Noyes Lab, 505 S. Mathews Ave., Urbana, IL 61801, d-dlott @ UIUC.EDU
Dana D. Dlott
Affiliation:
School of Chemical Sciences, University of Illinois, Urbana, IL 61801, Correspondence to Dana D.Dlott, Box 37 Noyes Lab, 505 S. Mathews Ave., Urbana, IL 61801, d-dlott @ UIUC.EDU
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Abstract

Time resolved vibrational spectroscopy with picosecond tunable mid-infrared pulses is used to measure the rates and investigate the detailed mechanisms of multiphonon up-pumping and vibrational cooling in a condensed high explosive, nitromethane. Both processes occur on the ˜100 ps time scale under ambient conditions. The mechanisms involve sequential climbing or descending the ladder of molecular vibrations. Efficient intermolecular vibrational energy transfer from various molecules to the symmetric stretching excitation of NO2 is observed. The implications of these measurements for understanding shock initiation to detonation and the sensitivities of energetic materials to shock initiation are discussed briefly.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 418: Symposium GG – Decomposition, Combustion, and Detonation Chemistry of Energetic Materials , 1995 , 357
Copyright
Copyright © Materials Research Society 1996

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