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Physics Programs & Projects

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Accelerator Facilities
Last Updated Date: 07/06/2015

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

National Air-Kerma Standard for Electronic Brachytherapy
Last Updated Date: 07/06/2015

The Dosimetry Group has developed a new facility for the calibration of the Xoft miniature x-ray source, which provides low-energy x-rays (< 50 … more

Absorbed Dose to Water and Air Kerma Calibrations in Co-60 Therapy Level Gamma-Ray Beams
Last Updated Date: 07/06/2015

Three dosimetry calibration laboratories accredited by the American Association of Physicists in Medicine (AAPM) routinely perform calibrations of … more

National and International Standards for X-ray Security Screening Applications
Last Updated Date: 07/06/2015

The primary objective of this project is to assure the technical performance and radiation safety of the nation’s x-ray and gamma-ray security … more

Support of the Navy Dosimetry Program
Last Updated Date: 07/06/2015

The U.S. Navy uses thermoluminescent dosimeters (TLDs) to monitor personnel for radiation exposure.

Radioactivity Standard Reference Material Program
Last Updated Date: 07/01/2015

The Standard Reference Materials Program of the National Institute of Standards and Technology (NIST) provides science, industry, and government … more

Small Mass and Small Force Metrology at NIST
Last Updated Date: 07/01/2015

There are two projects: The electronic milligram; and NIST-on-a-chip optomechanical methods for calibration of mass, force, laser power and other … more

Calibration of Force Transducers
Last Updated Date: 07/01/2015

NIST provides calibration services for force-measuring devices by applying known forces, either tension or compression, to the elastic device and … more

National Type Evaluation Program (NTEP)
Last Updated Date: 07/01/2015

The NTEP program is administered through the National Conference on Weights and Measures (NCWM).

NIST Mise en Pratique of the New Kilogram Definition
Last Updated Date: 07/01/2015

As part of a New SI system of units to be adopted in 2018, the kilogram will be redefined so that it may be realized in terms of Planck’s … more

Calibration of Mass Standards
Last Updated Date: 06/30/2015

NIST maintains the national standard for mass in the form of the prototype kilograms (K4, K20, K79, K92, and K102) and provides services to … more

SI-traceable Dynamic Force
Last Updated Date: 06/30/2015

Established calibration methods for force transducers are static, with a known constant force applied to the transducer and compared to the … more

Reconditioning of the 4.45 MN deadweight machine
Last Updated Date: 06/30/2015

Physical disassembly of the 4.45 MN (1,000,000 lbf) deadweight machine (DWM) began in FY15 in order to address material galling that developed in … more

Single Photonics and Quantum Information
Last Updated Date: 06/26/2015

The smallest unit of light is a “photon”. Generation, manipulation and measurement of light at or near the fundamental limit of a photon can … more

Integrated Near-field Optoelectronic (INFO) Scanning Probe
Last Updated Date: 06/25/2015

Scanning probe technology is an essential tool for measuring nanostructure properties. A major goal in our project is to develop unique probes … more

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