Extended x-ray absorption fine structure measurement of phase transformation in iron shocked by nanosecond laser

Journal Article · Thu Sep 15 04:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2036887· OSTI ID:20764545

Yaakobi, B; Boehly, T R; Meyerhofer, D D; Collins, T J.B.; Remington, B A; Allen, P G; Pollaine, S M; Lorenzana, H E; Eggert, J H ^[1]

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1. Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States)

Extended x-ray absorption fine structure (EXAFS) measurements have been used to demonstrate the phase transformation from body-centered-cubic (bcc) to hexagonal-closely packed (hcp) iron due to nanosecond, laser-generated shocks. The EXAFS spectra are also used to determine the volume compression and temperature in the shocked iron, which are consistent with hydrodynamic simulations and with the compression inferred from velocity interferometric (VISAR) measurements. This is a direct, atomic-level and in situ proof of shock-induced transformation in iron. Thus, the EXAFS data can be used both for studying the phase transformation as well as for characterizing the crystal conditions (density, temperature) during the transformation.

• OSTI ID: 20764545
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 12; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION SPECTROSCOPY
BCC LATTICES
COMPRESSIBILITY
COMPRESSION
COMPUTERIZED SIMULATION
CRYSTALS
DENSITY
FINE STRUCTURE
HCP LATTICES
IRON
LASER-PRODUCED PLASMA
PHASE TRANSFORMATIONS
PLASMA SIMULATION
SHOCK WAVES
VELOCITY
X RADIATION
X-RAY SPECTROSCOPY