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Author: Bruce Ravel

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1. Path degeneracy and EXAFS analysis of disordered materials
Published: 10/24/2014
Author: Bruce D Ravel
Abstract: The analysis of EXAFS data measured on a material with a disordered local configuration environment around the absorbing atom can be challenging due to the proliferation of photoelectron scattering paths that must be considered in the analysis. In th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915315

2. Bromination of marine particulate organic matter through oxidative mechanisms
Published: 9/14/2014
Authors: Bruce D Ravel, Alessandra C Leri, Kathleen Thornton, Lawrence M Mayer
Abstract: Although bromine is considered conservative in seawater, it exhibits a well established correlation with organic carbon in marine sediments. This carbon-bromine association was recently attributed to covalent bonding, with organobromine in sinking pa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915663

3. The red color in 19th century Thai glass studied by X-ray and optical spectroscopy
Published: 7/2/2014
Authors: Bruce D Ravel, Wantana Klysubun, G. Lawrence Carr, Christoph Hauzenberger
Abstract: The Temple of the Emerald Buddha in Bangkok, Thailand is noted for its glass mosaic decorations on exterior walls and statuary. The original mosaic artwork dates to the early 19th century and is composed of variously-colored, mirrored glass pieces. I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914254

4. National Synchrotron Light Source II: Long Islands state-of-the-art X-ray microscope
Published: 5/20/2014
Authors: Bruce D Ravel, Scott Calvin, Linnea Russell
Abstract: This is an education and outreach effort that we have undertaken for the benefit of the Photon Sciences Users' Executive Committee. The UEC is the group that represents the user of the National Synchrotron Light Source, which is currently in its fina ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915664

5. Sample Thickness and Quantitative Concentration Measurements in XANES Spectroscopy
Published: 5/16/2014
Authors: Alessandra C Leri, Bruce D Ravel
Abstract: While XANES spectroscopy is an established tool for quantitative information on chemical structure and speciation, elemental concentrations are generally quantified by other methods. The edge step in XANES spectra represents the absolute amount of t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915146

6. X-ray Absorption Study of Structural Coupling in Photomagnetic Prussian Blue Analogue Core@Shell Particles
Published: 4/22/2014
Authors: Daniel M Pajerowski, Bruce D Ravel, Carissa H. Li, Matthieu F. Dumont, Daniel R. Talham
Abstract: X-ray absorption spectroscopy experiments of core@shell, photomagnetic, Prussian blue analogue heterostructures obtain local structure around the magnetic, transition metal ions before and after illumination. Two samples, containing nickel hexacyanoc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915210

7. Diamond Sensors and Polycapillary Lenses for X-ray Absorption Spectroscopy
Published: 10/13/2013
Author: Bruce D Ravel
Abstract: Diamond sensors are evaluated as incident beam monitors for X-ray Absorption Spectroscopy experiments. These single crystal devices pose a challenge for an energyscanning experiment using hard X-rays due to the e ect of diffraction from the crystalli ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913887

8. EXAFS Studies of Catalytic DNA Sensors for Mercury Contamination of Water
Published: 12/11/2009
Authors: Bruce D Ravel, S.C. Slimmer, X. Meng, G.C.L. Wong, Y. Lu
Abstract: Monitoring of metallic contaminants in domestic and agricultural water systems systems requires technology that is fast, flexible, sensitive, and selective. Recently, metal sensors based on catalytic DNA have been demonstrated as a practical monitor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854469

9. Condensed Matter Astrophysics A Prescription for Determining the Species-Specific Composition and Quantity of Interstellar Dust using X-rays
Published: 9/10/2009
Authors: Bruce D Ravel, Julia C. Lee, Jingen Xiang, Jeffrey Kortright, Kathryn Flanagan
Abstract: We present a new technique for determining the quantity and composition of dust in astrophysical environments using < 6 keV X-rays. We argue that high resolution X-ray spectra as enabled by the Chandra and XMM-Newton gratings should be considered ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903572

10. Pentavalent Uranium Oxide via Reduction of [UO^d2^]^u2+^ Under Hydrothermal Reaction Conditions
Published: 5/23/2008
Authors: Nebebech Belai, Mark Frisch, Eugene Ilton, Bruce D Ravel, Christopher Cahill
Abstract: The synthesis, crystal structure and spectroscopic characterization of [UV(H2O)2(UVIO2)2O4(OH)](H2O)4, a mixed-valent UV/UVI oxide material, are reported. The hydrothermal reaction of UO22+ with Zn and hydrazine at 120 °C for three days yields 1 in t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854092



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