Accession Number : ADA322640

Title :   Spectroscopic Determination of Impact Sensitivities of Explosives.

Descriptive Note : Final rept. Jun 95-Jun 96,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : McNesby, K. L. ; Coffey, C. S.

PDF Url : ADA322640

Report Date : MAR 1997

Pagination or Media Count : 52

Abstract : A single theory is developed that predicts impact sensitivities in crystalline explosives from vibrational spectra measured at room temperature. The theory uses Raman spectra of energetic materials to construct vibrational energy level diagrams which are then used as input for a model designed to calculate the rate of energy transfer from phonon and near-phonon vibrational energy levels to higher energy vibrational levels. Energy transfer rates are determined using Fermi's Golden Rule, and results from simple theories of near-resonant energy transfer. The application of the theory and model, using Raman spectra of seven different neat explosive samples, gives results in good agreement with results of drop weight impact tests.

Descriptors :   *MODELS, *CRYSTALS, *EXPLOSIVES, *WEIGHT, *LEVEL(QUANTITY), *RAMAN SPECTRA, SPECTROSCOPY, IMPACT TESTS, THEORY, ENERGY TRANSFER, SENSITIVITY, RESONANCE, DROP TESTS, PHONONS, ENERGETIC PROPERTIES, ENERGY LEVELS, VIBRATIONAL SPECTRA.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Combustion and Ignition
      Physical Chemistry
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE