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Radiation Physics Programs & Projects

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Test and Evaluation Protocols for ANSI/IEEE N42 Standards
Last Updated Date: 06/22/2015

The purpose of these test and evaluation protocols is to provide additional information to the published ANSI/IEEE N42 series for homeland … more

Standards Development for Detection of Illicit Trafficking of Radioactive
Last Updated Date: 06/22/2015

The National Institute of Standard and Technology (NIST) is working in the development of ANSI/IEEE and IEC standards for the detection of illicit … more

Gamma-ray Spectrometry System
Last Updated Date: 06/22/2015

NIST is equipped with a high resolution gamma-ray spectrometry system used for activity and impurity measurements of gamma-ray emitting sources … more

Testing of Radiation Detection Systems
Last Updated Date: 06/22/2015

NIST is working together with the Department of Homeland Security (DHS) Domestic Nuclear Detection Office (DNDO) in testing radiation detection … more

Active Interrogation Standards
Last Updated Date: 06/12/2015

Active interrogation involves directing nuclear radiation into a closed container and measuring secondary radiations to gain information about the … more

ANSI N42.42 Standard
Last Updated Date: 05/14/2015

The purpose of the N42 data format is to facilitate manufacturer-independent transfer of information from radiation measurement instruments for … more

Advanced Neutron Imaging Facility
Last Updated Date: 04/21/2015

The NIST Neutron Imaging Facility (NNIF) at the NIST Center for Neutron Research .

Absolute Ag108 Characterization Based on Gamma-Gamma Coincident Detection by Two Nai (TI) Detectors
Last Updated Date: 04/02/2015

A two-dimensional analysis of three coincident gamma-rays in 108 Ag m decay, detected by two NaI(Tl) scintillation detectors, allows a direct … more

Applications of Diagnostic X-ray Spectrometers
Last Updated Date: 04/02/2015

The Dosimetry Group designs, fabricates, and calibrates bent-crystal optics and diagnostic spectrometers for customers around the world. more

Synchrotron Radiation-Based Calibrations for Space Weather Prediction
Last Updated Date: 03/24/2015

Orbital ultraviolet and extreme-ultraviolet spectrometers are calibrated on beamline 2, taking advantage of the calculability of synchrotron … more

NIST Lyman-Alpha Neutron Detector (LAND)
Last Updated Date: 03/24/2015

The well-known interaction of low-energy neutrons and 3 He produces a proton and a triton with 764 keV of kinetic energy shared between the two … more

Evolution of Image Spatial Resolution
Last Updated Date: 12/26/2013

Measuring the through-plane water content in a hydrogen fuel cell is critical to understanding this complicated heat and mass transport … more

Measurement of the Neutron Magnetic Dipole Moment Using Schwinger Scattering
Last Updated Date: 07/30/2013

This experiment will measure Schwinger scattering in silicon. Previous attempts done by Shull and others did not produce the expected results. The … more

Search for Time Reversal Violation in Polarized Neutron Decay (emiT)
Last Updated Date: 07/30/2013

The "emiT" experiment searches for - or will set an improved upper bound on - the time-reversal asymmetry term in neutron beta decay. It does so … more

Characterization of Porous Transport Media for Hydrogen Fuel Cells
Last Updated Date: 07/23/2013

Efficiently managing water transport in proton exchange membrane fuel cells (PEMFCs) is critical to the performance, cost, and durability in order … more

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