Measurements of the time-dependent fluorescence depolarization of emissive probe molecules enable realtime observations of molecular rotations in shocked materials. In shocked solids, molecular rotations occur as a result of shear deformations. An apparatus is described to measure time-dependent fluorescence depolarization of shocked materials using laser-driven flyer plates and either a picosecond or a nanosecond probe laser. The emission was separated into parallel and perpendicular channels and imaged onto a streak camera. Time-dependent fluorescence depolarization of rhodamine 6G (R6G) dye dissolved in poly-methyl methacrylate (PMMA) was measured with a 16 ns duration impact at 1 km s-1. A partial depolarization of the dye emission was observed to occur during a 150 ns period after the shock.
|Title of host publication
|Shock Compression of Condensed Matter - 2015
|Subtitle of host publication
|Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter
|Ramon Ravelo, Thomas Sewell, Ricky Chau, Timothy Germann, Ivan I. Oleynik, Suhithi Peiris
|American Institute of Physics Inc.
|Published - Jan 13 2017
|19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015 - Tampa, United States
Duration: Jun 14 2015 → Jun 19 2015
|AIP Conference Proceedings
|19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015
|6/14/15 → 6/19/15
ASJC Scopus subject areas
- General Physics and Astronomy