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Related Experiment Video

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Research and Development of High-performance Explosives
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Ultraviolet Emissions from Explosive Detonation Breakout.

Stephanie Johnson1, Joel Schwallier2, Nick Glumac2

  • 1Air Force Research Laboratory, Eglin Air Force Base, Eglin, FL, USA.

Applied Spectroscopy
|January 20, 2022
PubMed
Summary

High explosive detonation generates extreme temperatures exceeding 5000 K, identified via ultraviolet spectroscopy of molecular signatures like CN and N2. These findings aid in forensic analysis of explosives.

Keywords:
ExplosivesUVdetonationemission spectroscopyshock waveultraviolet

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Area of Science:

  • Spectroscopy
  • High Explosives
  • Combustion Chemistry

Background:

  • Understanding high explosive detonation is crucial for safety and forensic applications.
  • Previous studies have limited spectroscopic data in the ultraviolet (UV) region post-detonation.

Purpose of the Study:

  • To present detailed UV spectroscopic measurements of high explosive detonation breakout.
  • To analyze molecular features and determine temperature profiles.
  • To discuss implications for forensic analysis.

Main Methods:

  • Performed detailed spectroscopic measurements in the ultraviolet region during high explosive detonation breakout.
  • Observed and analyzed molecular features associated with CN, NH, OH, and N2.
  • Measured temperature using spectral broadening and band intensity analysis.

Main Results:

  • Observed molecular features from detonation products (CN, NH, OH, N2).
  • Spectra indicated extreme temperatures exceeding 5000 K within microseconds post-breakout.
  • Molecular bands were confirmed to originate from detonation products, not ambient air.
  • Oxygen was found to strongly attenuate these molecular bands.

Conclusions:

  • UV spectroscopy provides valuable insights into high explosive detonation dynamics.
  • The extreme temperatures and specific molecular signatures can be used for explosive identification.
  • Findings have direct implications for forensic analysis of explosive residues.