Extended x-ray absorption fine-structure experiments with a laser-imploded target as a radiation source

Journal Article · Wed Jan 08 23:00:00 EST 2003 · Journal of the Optical Society of America B

DOI:https://doi.org/10.1364/JOSAB.20.000238· OSTI ID:806757

Yaakobi, B ^[1]; Marshall, F J; Boehly, T R; Town, R P. J.; Meyerhofer, D D

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1. Laboratory for Laser Energetics, University of Rochester

The feasibility of using extended x-ray absorption fine structure (EXAFS) for characterizing metals shocked to megabar pressures by a laser has been studied. High-contrast K-edge modulations for an unshocked Ti-foil absorber were obtained using a laser-imploded spherical target as a source. The high intensity and relative smoothness of the source spectrum enable us to work with thick Ti foils, which increases the relative modulation in the measured signal. Using a semi-empirical model to describe the shock-compressed foil, we show that the compression extends the temperature range at which EXAFS modulations can be observed, due to the rise in Debye temperature with density.

• Research Organization: Laboratory for Laser Energetics, University of Rochester, Rochester, NY (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 806757
• Report Number(s): DOE/SF-19460-466; 1337; 2002-22
• Journal Information: Journal of the Optical Society of America B, Journal Name: Journal of the Optical Society of America B Journal Issue: 1 Vol. 20
• Country of Publication: United States
• Language: English

Related Subjects

''EXTENDED X-RAY ABSORPTION FINE-STRUCTURE EXPERIMENTS WITH A LASER-IMPLODED TARGET AS A RADIATION SOURCE''......(OAK/B202).
07 ISOTOPE AND RADIATION SOURCES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ABSORPTION SPECTROSCOPY
DEBYE TEMPERATURE
FINE STRUCTURE
FOILS
IMPACT SHOCK
LASER IMPLOSIONS
MATHEMATICAL MODELS
MODULATION
RADIATION SOURCES
ROUGHNESS
TITANIUM
X-RAY SPECTROSCOPY