TITLE

Time-resolved absorption spectroscopy in shocked PETN single crystals

AUTHOR(S)
Gruzdkov, Y. A.; Gupta, Y. M.; Dick, J. J.
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p929
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Extinction spectra of PETN and photodiode transmission records, with 50 and 0.5 ns resolution respectively, were obtained for shock compression along the [110] and [100] directions. Light extinction was found to be due to absorption; the contribution of scattering was measured to be below 0.001%. Results for final stresses up to 10 GPa (stepwise loading) and initial stresses up to 5 GPa are presented. Broad band absorption in the visible appeared in PETN single crystals shocked to as low as 1 GPa. Absorption changes were measured as a function of time, stress, and crystal orientation. The process responsible for absorption occurred on a time scale faster than 0.5 ns. Work is in progress to identify the origin of the absorption.
ACCESSION #
5985363

 

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