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Radiation Physics Division

The Division develops, maintains and disseminates the national measurement standards for ionizing radiation and radioactivity, and methods and models to address related applications.

In addition to our mission to realize the Système International (SI) units for absorbed dose (the gray) and activity (the becquerel), we maintain an active research programs in terahertz spectroscopy, neutron physics, radiation dosimetry, and radionuclide metrology. We are also active in over-arching programmatic efforts in medical physics to support medical imaging and therapeutics, standards and test procedures for chemical/biological/radiation/nuclear/explosives countermeasures in homeland security, measurement assurance and standards to support environmental stewardship and the nuclear energy and radiation industries, and methods in applications of ionizing radiation in advanced manufacturing. We promote the accurate and meaningful measurements of dosimetric quantities pertaining to ionizing radiation (x and gamma rays, electrons, and energetic, positively charged particles) and provide measurement services, standards, and fundamental research to support neutron technology and neutron physics for industrial research and development through neutron dosimetry, calibration of neutron survey instruments, and development of neutron sources. We are also responsible for developing metrological techniques to standardize new radionuclides for research and for exploring radiation and nuclear applications, including through development and distribution of the Standard Reference Materials for radioactivity in the U.S..

News and Updates

Neutrons by the Numbers

After years of research, scientists at the National Institute of Standards and Technology (NIST) have developed and demonstrated a way to count the absolute

Projects and Programs

Neutron Cross Section Standards

NIST continues to be deeply involved with measurements and evaluations of neutron cross section standards. NIST maintains a limited experimental effort focused

Accelerator Facilities

The Radiation Physics Division's accelerator facilities continue to support a broad range of research efforts in the areas of industrial and medical dosimetry

Tools and Instruments

Far-infrared Spectrometer

Nicolet Magna 550 FTIR for far- and mid-infrared spectral acquisition. This modified instrument contains a silicon-coated mylar beamsplitter and standard DTGS

Medical-Industrial Radiation Facility

The Medical-Industrial Radiation Facility (MIRF) located in the Radiation Physics Division of the NIST Physical Measurement Laboratory is a user facility for

Awards

2010 PECASE - Daniel Hussey

The Presidential Early Career Awards for Scientists and Engineers (PECASE) represent the highest honor bestowed by the United States...

2010 APS Fellow - Muhammad Arif

The criterion for election is exceptional contributions to the physics enterprise; e.g., outstanding physics research, important...

Contacts

Division Chief