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Title: In-situ Raman spectroscopy and high-speed photography of a shocked triaminotrinitrobenzene based explosive

We have developed a single-shot Raman spectroscopy experiment to study at the molecular level the initiation mechanisms that can lead to sustained detonation of a triaminotrinitrobenzene-based explosive. Shocks up to 30 GPa were generated using a two-stage laser-driven flyer plate generator. The samples were confined by an optical window and shock pressure was maintained for at least 30 ns. Photon Doppler Velocimetry measurements were performed at the explosive/window interface to determine the shock pressure profile. Raman spectra were recorded as a function of shock pressure and the shifts of the principal modes were compared to static high-pressure measurements performed in a diamond anvil cell. Our shock data indicate the role of temperature effects. Our Raman spectra also show a progressive extinction of the signal which disappears around 9 GPa. High-speed photography images reveal a simultaneous progressive darkening of the sample surface up to total opacity at 9 GPa. Reflectivity measurements under shock compression show that this opacity is due to a broadening of the absorption spectrum over the entire visible region.
Authors:
; ;  [1] ;  [2]
  1. CEA, DAM, Le RIPAULT, F-37620 Monts (France)
  2. Institut P', UPR CNRS 3346, ENSMA, Université de Poitiers, F-86961 Futuroscope, Chasseneuil (France)
Publication Date:
OSTI Identifier:
22412800
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; COMPARATIVE EVALUATIONS; COMPRESSION; DIAMONDS; EXPLOSIONS; EXPLOSIVES; INTERFACES; LASER RADIATION; OPACITY; PHOTOGRAPHY; PLATES; PRESSURE DEPENDENCE; PRESSURE RANGE GIGA PA; RAMAN SPECTRA; RAMAN SPECTROSCOPY; REFLECTIVITY; SURFACES; TEMPERATURE DEPENDENCE