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Physics Programs & Projects

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Air Kerma Calibrations in Radiation Protection Level 137Cs and 60Co Gamma Ray Beams
Last Updated Date: 07/06/2015

The Dosimetry Group maintains and disseminates the national measurement standards for air-kerma (exposure) from 137 Cs and 60 Co gamma-ray beams … more

Design and Construction of a New Cs-137 Gamma-ray Calibration Facility
Last Updated Date: 07/06/2015

The construction of a new primary calibration facility for air kerma measurements has been completed. It delivers a collimated 137 Cs gamma-ray … more

International Comparisons for Air Kerma and Absorbed Dose to Water from Gamma-ray Beams
Last Updated Date: 07/06/2015

A bilateral comparison was conducted between NIST and the International Atomic Energy Agency (IAEA) to support international efforts for … 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

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

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

NIST Stars
Last Updated Date: 06/19/2015

NIST Stars is an Innovations in Measurement Science project to create a catalog of stars whose top-of-the-atmosphere spectral flux has an SI … more

Quantum State Manipulation of Ultra-cold Fermionic and Bosonic Atoms
Last Updated Date: 06/19/2015

This theoretical research is done in collaboration with scientists at the Joint Quantum Institute (JQI) and the Center for Quantum Information and … more

Light-matter Interactions in Semiconductor Nanostructures
Last Updated Date: 06/03/2015

The quantum optics of light interacting with semiconductor-based nanostructures is being studied to extend concepts of entanglement and coherence … more

Spectroscopy of Engineered Atoms
Last Updated Date: 05/29/2015

Experiments with atomic systems designed to have features more favorable for improved measurements of atomic properties and constants of nature. more

Plasma Metrology
Last Updated Date: 05/27/2015

Experimental and computational techniques in support of commercial and scientific uses of plasmas.

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