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https://www.nist.gov/history/radiation-physics-building/staff/james-e-leiss

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NIST History

## Radiation Physics Building

-  Staff  Expand or Collapse    -  Martin Berger 
  -  Randall S. Caswell 
  -  Louis Costrell 
  -  Margaret Ehrlich 
  -  Evans V. Hayward 
  -  Raymond W. Hayward 
  -  John Hubbell 
  -  Herman William Koch 
  -  James E. Leiss 
  -  Robert Loevinger 
  -  Robert Madden 
  -  Wilfrid B. Mann 
  -  William L. McLaughlin 
  -  Joseph W. Motz 
  -  Harold Wyckoff 
-  Facilities  Expand or Collapse    -  Cobalt-60 Pool Source 
  -  Isotope Separator Laboratory Facility 
  -  Linac 
  -  Mammographic X-Ray Facility 
  -  Manganese Bath Facility 
  -  Positive-Ion Van de Graaff Accelerator 
  -  Radon Calibration Facility 
  -  Synchrotron Ultraviolet Radiation Facility 
  -  The Curiously Colorful Wall of NIST's Radiation Physics Building 
  -  Construction 
-  Research Highlights  Expand or Collapse    -  External Beam Radiotherapy 
  -  Hazards From Radioactivity in the Environment 
  -  Neutron Spin Filters 
  -  Nuclear Medicine 
  -  Nuclear Theory and Radiation Data 
  -  Radiation Detection Standards for Homeland Security 
-  Modernization 
-  Colloquium Talk 
-  Credits 

# James E. Leiss

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## 1924-2008

James E. Leiss received his B.S. in physics from Case Institute of Technology in 1946; his M.S. in physics from the University of Illinois in 1951; and his Ph.D. from the University of Illinois in 1954. For his thesis, he explored photomeson production, in which high-energy electromagnetic radiation aimed at atomic nuclei can create quark-antiquark pairs known as mesons; and bremsstrahlung cross section analysis, which looks at the electromagnetic radiation produced by decelerating charged particles. He studied the design and operation of electron accelerators at the University of Paris, November 1959-July 1960. Leiss was hired to work in the National Bureau of Standards (NBS, now the National Institute of Standards and Technology, NIST) High Energy Radiation Physics Section in 1954. He was promoted to chief of the Accelerator Branch in 1966 and chief of the Linac Radiation Division in 1968. Leiss was named director of the NBS Center for Radiation Research, where he served from 1970-78. He left NBS to become associate director of the Department of Energy Office of High Energy and Nuclear Physics, where he served from 1978-86. 

**Notable honors and awards:**
                  - Gold Medal, U.S. Department of Commerce, 1966
                  

**Other appointments:**
                  - Chairman, American Physical Society Division of Physics of Beams, 1985
                  

**Research interests:** management of operations and research program on the NBS high energy accelerators including the synchrotron and the linac; studies of elastic and inelastic scattering of electrons; design of experimental equipment for use with the linear accelerator

PhysicsRadiation

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