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Stephen M Seltzer (Assoc)

Research Areas
Development and improvement of national measurement standards for the dosimetry of ionizing radiation (gamma rays, x rays, electrons, etc.). Development of mathematical methods and techniques for calculation of the transport of ionizing radiation through extended media, notably Monte Carlo methods for electron and photon transport. Development and critical evaluation of pertinent cross section information for photon, electron, positron, proton and alpha-particle interactions with matter. In some 180 publications, application areas have included theoretical dosimetry, response of radiation detectors used in radiation dosimetry and spectroscopy, Aurora physics, space-radiation shielding, radiation-source characterization, and radiation processing. 

Society Memberships

  • American Physical Society
  • American Association of Physicists in Medicine
  • Health Physics Society
  • Sigma Xi
  • Council on Ionizing Radiation Measurements and Standards

Elected Positions (Professional Committee Assignments)

  • Consultant, Subcommittee on Penetration of Charged Particles, National Academy of Sciences-National Research Council
  • Member, Report Committee on Stopping Power for Electrons and Positrons, International Commission on Radiation Units and Measurements (ICRU)
  • Member, Report Committee on Stopping Power for Protons and Alpha Particles (ICRU)
  • Member, Report Committee on Beta-Ray Dosimetry for Radiation Protection (ICRU)
  • Member, Sub-panel on the Use of Particle Fluence for Radiation Risk Assessment, Committee on Interagency Radiation Research and Policy Coordination (OSTP)
  • Member, Scientific Committee 86, "Hot Particles in the Eye, Ear or Lung," National Council on Radiation Protection and Measurements (NCRP)
  • Chairman, Joint NCRP/ICRU Ad Hoc Committee on Computer Applications
  • Member, Radiation Therapy Committee, American Association of Physicist in Medicine (AAPM)
  • Member, Calibration Laboratory Accreditation Subcommittee (AAPM)
  • Member, Secondary Standards Dosimetry Laboratory Scientific Committee, International Atomic Energy Agency (IAEA)
  • Member, International Commission on Radiation Units and Measurements (ICRU)
  • Past Secretary, International Commission on Radiation Units and Measurements (ICRU)
  • Chairman, Committee on Fundamental Quantities and Units (ICRU)
  • Scientific Editor, International Commission on Radiation Units and Measurements (ICRU)
  • Member, National Council on Radiation Protection and Measurements (NCRP)
  • Member, Scientific Committee 6-1, Uncertainties in Radiation Measurement and Dosimetry (NCRP)
  • Member, Task Group No.51, External Beam Dosimetry Protocol, American Association of Physicists in Medicine (AAPM)
  • Member, Task Group No. 61, Kilovoltage X-ray Dosimetry (AAPM)
  • Member, Task Group No. 152, AAPM Recommendations on Regulations for Electronic Brachytherapy (AAPM)
  • Member, Task Group No. 139, Review and extension of beam quality conversion factors for TG-51 protocol (AAPM)
  • Member, Working Group on Dosimetry Calibration Protocol for Beams that are Not Compliant with TG-51 (AAPM)
  • Chairman, Report Committee on Key Data for Measurement Standards in the Dosimetry of Ionizing Radiation (ICRU)


  • IR 100 Award (co-recipient), 1979
  • Department of Commerce Bronze Medal, 1983
  • NIST Standard Reference Data Program Measurement Services Award, 1992
  • Department of Commerce Silver Medal, 1999
  • Federal Laboratory Consortium Award for Excellence in Technology Transfer: radiation measurement standards for prostate cancer brachytherapy, 2000
  • NIST Safety Award for Superior Accomplishment, 2002
  • Fellow, American Association of Physicist in Medicine, 2009


Measurements and Standards for Bulk-Explosive Detection

Lawrence T. Hudson, Fred B. Bateman, Paul M. Bergstrom, Frank Cerra, Jack L. Glover, Ronaldo Minniti, Stephen M. Seltzer, Ronald E. Tosh
Due to the ease of assembly and leveraged disruptive effect, the improvised explosive device (IED) is the method of choice of today’s terrorist. With more than

Absolute measurements of x-ray backlighter sources at energies above 10 keVa)

Lawrence T. Hudson, B.R. Maddox, H.S. Parks, B A. Remington, C. Chen, S Chen, S. T. Prisbrey, A. Comley, C A. Back, C. Szabo, John F. Seely, Uri Feldman, Stephen M. Seltzer, M. J. Haugh, Z. Ali
Line emission and broadband x-ray sources with x-ray energies above 10 keV have been investigated using a range of calibrated x-ray detectors for use as x-ray
Created October 3, 2019, Updated June 15, 2021