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Author Henson, B. F. ♦ Asay, B. W. ♦ Sander, R. K. ♦ Son, S. F. ♦ Robinson, J. M. ♦ Dickson, P. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ EXPLOSIONS ♦ EXPLOSIVES ♦ PHASE TRANSFORMATIONS ♦ PYROLYSIS ♦ HARMONIC GENERATION ♦ LASER RADIATION ♦ IGNITION
Abstract We demonstrate the use of optical second harmonic generation (SHG) to identify the {beta}-{delta} phase transition in polycrystalline HMX. This phase transition has been implicated in the thermal decomposition of HMX for over 30 years. We measure an order of magnitude difference in SHG cross section from the {beta} and {delta} phases and use this intensity difference to observe the phase transition during CO{sub 2} laser irradiation. This is the first known {ital inthinspthinspsitu } measurement of a phase transition in such an energetic material during a dynamic experiment, and the first example of SHG from this class of organic nitramine molecular crystals. {copyright} {ital 1999} {ital The American Physical Society}
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 1999-02-01
Publisher Place United States
Journal Physical Review Letters
Volume Number 82
Issue Number 6


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