Extended x-ray absorption fine-structure experiments with a laser-imploded target as a radiation source
Journal Article
·
· Journal of the Optical Society of America B
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; TRN: US200307%%312
- Journal Information:
- Journal of the Optical Society of America B, Vol. 20, Issue 1; Other Information: Submitted to Journal of the Optical Society of America B, Volume 20, No.1; PBD: 9 Jan 2003
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
07 ISOTOPES AND RADIATION SOURCES
ABSORPTION SPECTROSCOPY
X-RAY SPECTROSCOPY
DEBYE TEMPERATURE
FINE STRUCTURE
MODULATION
RADIATION SOURCES
ROUGHNESS
LASER IMPLOSIONS
TITANIUM
MATHEMATICAL MODELS
FOILS
IMPACT SHOCK
''EXTENDED X-RAY ABSORPTION FINE-STRUCTURE EXPERIMENTS WITH A LASER-IMPLODED TARGET AS A RADIATION SOURCE''......(OAK/B202).
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
07 ISOTOPES AND RADIATION SOURCES
ABSORPTION SPECTROSCOPY
X-RAY SPECTROSCOPY
DEBYE TEMPERATURE
FINE STRUCTURE
MODULATION
RADIATION SOURCES
ROUGHNESS
LASER IMPLOSIONS
TITANIUM
MATHEMATICAL MODELS
FOILS
IMPACT SHOCK
''EXTENDED X-RAY ABSORPTION FINE-STRUCTURE EXPERIMENTS WITH A LASER-IMPLODED TARGET AS A RADIATION SOURCE''......(OAK/B202).