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Grant B. Bunker

Grant B. Bunker Ph.D.

Chair, Department of Physics
Professor of Physics






182C Life Sciences Building

Office Hours: 

By appointment


B.S. The Evergreen State College
Ph.D. University of Washington

Research & Accomplishments 

Biophysics, Synchrotron Radiation, X-ray Absorption Spectroscopy, Instrumentation, Novel Data Analysis Methods and Software, Computational Physics, Chemistry, Biology; Complex Systems.

Biophysics; X-ray absorption spectroscopy of metalloproteins; synchrotron radiation techniques and instrumentation; data analysis and molecular modeling; computational physics, chemistry, and biology.

Founding director 1991-2001, Biophysics Collaborative Access Team (BioCAT) at Argonne. President, Quercus X-ray Technologies, LLC, 2001-present.

Inventor of novel x-ray instrumentation and methods for data analysis.


X-ray Absorption Spectroscopy (XAFS) and Synchrotron Radiation.


  • Applications of x-ray absorption spectroscopy to biological systems and materials
  • Ab initio quantum mechanical calculation of vibrational behavior of enzymes and other molecular and nonmolecular systems
  • X-ray optics and instrumentation
  • Bent crystal optics
  • Energy conservation technologies
  • X-ray Absorption Fine Structure (XAFS) spectroscopy education and training
  • Investigations of complex systems and emergent order


  • US 20060021690 "Integral pressure regulation system for tires and other vessels containing compressible fluids"


Quantitative performance measurements of bent crystal Laue analyzers for X-ray fluorescence spectroscopy C. Karanfil,* G. Bunker M. Newville, C. U. Segre and D. Chapman J. Synchrotron Rad. (2012). 19, 375–380

Introduction to XAFS: A Practical Guide to X-ray Absorption Fine Structure Spectroscopy"Introduction to XAFS: A Practical Guide to X-ray Absorption Fine Structure Spectroscopy", Cambridge University Press, 2009.

Zinc cysteine active sites of metalloproteins: A density functional theory and x-ray absorption fine structure study, N Dimakis, M Farooqi,Emily Sofia Garza,and G Bunker. The Journal of Chemical Physics 128, 115104, 2008.

"Group-fitted ab initio single- and multiple-scattering EXAFS Debye-Waller factors" Nicholas Dimakis and Grant Bunker Phys. Rev. B. Rapid Communications, 65 201103(R), 10 May 2002.

Initial results on logarithmic spiral bent laue analyzer for fluorescence x-ray absorption spectroscopy, C. Karanfil, D. Chapman, G. Bunker, C. Segre, Review of Scientific Instruments, vol 73 no 3, p 1616, 2002

"X-ray Absorption Spectrometers", G. Bunker, in Encyclopedia of Spectroscopy and Spectrometry, p2447-2554, Academic Press, 1999.

"Practical Regularization Methods for Analysis of EXAFS Spectra", G. Khelashvili and G. Bunker, J. Synch. Rad. 6, 271- 273 (1999)

Ab initio single- and multiple-scattering EXAFS Debye-Waller factors: Raman and infrared dataN Dimakis, G. Bunker. Phys. Rev. B 58, 2467-2475 (1998)

Application of the ratio method of EXAFS analysis to disordered systems,  Bunker, G. Nuclear Instruments and Methods in Physics Research, vol. 207, issue 3, pp. 437-444.




  • ANL "Dynamic Self-Assembly of Active Bioparticles"

Community Service 

  • Workshop on the physics of music and sound reproduction for fifth graders, Oak Park Global Village Young Scientist's Conference