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Bruce D. Ravel


Research Interests

  • Method development in the field of X-ray Absorption Spectroscopy (XAS) and related inner-shell spectroscopies, including development of novel measurement techniques and detector technologies
  • Development of software tools for XAS data acquisition, processing, and analysis
  • Application of XAS to a wide variety of scientific disciplines. Along with materials science interests in the areas of ferroelectrics and strongly correlated electron systems, I have applied XAS measurements to a wide variety of scientific disciplines, including the environmental sciences,  the interpretation of astronomical spectra, the study of objects of cultural heritage, and many others.


Figure 1: The Beamline for Materials Measurement (BMM, 06-BM) at the National Synchrotron Light Source II. BMM is NIST's beamline for X-ray Absorption Spectroscopy and X-ray Diffraction and will begin operations in late 2017.

Figure 2: Screenshots of software for XAS data processing and analysis written by Bruce Ravel. On the left is Athena, a program for reducing and processing measured XAS data.  In the middle is Artemis, a program for quantitative analysis of the Extended X-ray Absorption Fine Structure (EXAFS).  on the right is Hephaestus, a periodic table for X-ray Absorption spectroscopist.  This software is used by scientists worldwide and is cited in the scientific literature over 500 times per year.

Postdoctoral Research Opportunities

Synchrotron-based X-ray absorption spectroscopy is used in conjunction with novel theory and analysis methods to develop, understand, and optimize materials for microelectronics, catalysis, energy science, and other fields. Materials that can be investigated cover all forms of condensed matter from monolayer films to the bulk, from crystalline to highly disordered. These studies offer the opportunity to develop and utilize world-class X-ray instrumentation and detectors.

Professional Service

  • Member of the IUCr Commission on XAFS, 2014-2023
  • Chair of the spectroscopy Proposal Review Panel for NSLS-II.  Member of proposal review panels for synchrotron facilities worldwide, including the Stanford Synchrotron Radiation Laboratory (SSRL) and the Cornell High Energy Synchrotron Source (CHESS), SPring-8 in Japan, Elettra in Italy, the Canadian Light Source, and SESAME in Jordan.

Publication Prior to Joining NIST:

ATHENA, ARTEMIS, HEPHAESTUS: data analysis for X-ray absorption spectroscopy using IFEFFIT, B. Ravel and M. Newville, J. Synchrotron Radiation, 12, 537-541 (2005).

Real-space multiple-scattering calculation and interpretation of X-ray-absorption near-edge structure, Physical Review B 58, 7565–7576 (1998)


Non-Resonant Valence-to-Core X-ray Emission Spectroscopy of Niobium

Bruce D. Ravel, A. J. Kropf, Dali Yang, Mengen Wang, Mehmet Topsokal, Deyu Lu, M. C. Stennett, N. C. Hyatt
The valence-to-core (V2C) portion of X-ray Emission Spectroscopy (XES) measures the electron 15 states close to the Fermi level. These states are involved in

Ultrafast time-resolved x-ray absorption spectroscopy of ferrioxalate photolysis with a laser plasma x-ray source and microcalorimeter array

Galen C. O'Neil, Joel N. Ullom, Luis Miaja Avila, Young Il Joe, Joseph W. Fowler, Carl D. Reintsema, Daniel S. Swetz, Kevin L. Silverman, Daniel R. Schmidt, Bruce D. Ravel, Gene C. Hilton, William B. Doriese, Bradley K. Alpert, Ralph Jimenez
Using a table-top apparatus based upon a laser plasma x-ray source and an array of cryogenic microcalorimeter x-ray detectors, we have measured the transient x
Created October 9, 2019, Updated November 14, 2019