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Radiation Physics Programs & Projects

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Characterization of Porous Transport Media for Hydrogen Fuel Cells
Last Updated Date: 08/25/2015

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

Neutron Imaging for Advanced Catalyst Development and Durability Studies
Last Updated Date: 08/25/2015

Neutron imaging continues to play a key role in elucidating the role of water in proton exchange membrane fuel cells (PEMFCs) as highlighted by … more

Towards a Neutron Microscope
Last Updated Date: 08/25/2015

A novel neutron lens based on reflection has recently been developed that could greatly benefit neutron imaging and other neutron scattering … more

Radioactivity Standard Reference Material Program
Last Updated Date: 08/24/2015

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

ICE 62755 Standard N42 Data Format
Last Updated Date: 08/24/2015

The purpose of the IEC 62755 standard N42 data format is to facilitate manufacturer-independent transfer of information from radiation measurement … more

Photovoltaic Carrier Dynamics Measured by Time-Resolved Terahertz Spectroscopy
Last Updated Date: 08/24/2015

Far-infrared (or THz, 25 to 300 micron wavelength) femtosecond laser methods are employed to measure photovoltaic (PV) materials spectra and … more

Active Interrogation Standards
Last Updated Date: 08/18/2015

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

Support of the Navy Dosimetry Program
Last Updated Date: 08/18/2015

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

Pushing and Understanding the Limits of Spin-Exchange Optical Pumping of He-3
Last Updated Date: 08/17/2015

Neutron spin filters based on polarized 3He rely on the strong spin dependence of the absorption of neutrons by 3He gas.

X-ray Detection with Large Area Avalanche Photodiodes for the Neutron Radiative Decay Experiment
Last Updated Date: 08/17/2015

Operation of the second neutron radiative decay experiment has been completed. In this experiment we observed the emission of photons that … more

Californium Neutron Irradiation Facility
Last Updated Date: 08/17/2015

NIST maintains the Californium Neutron Irradiation Facility (CNIF), which is an exposure facility providing fast neutrons for irradiations … more

Precision Measurement of the Branching Ratio and Energy Spectrum of Radiative Neutron Decay
Last Updated Date: 08/17/2015

Neutron beta-decay is typically considered as a three-body process, but it is always accompanied by inner-bremsstrahlung soft photons, n → e − + p … more

Standard Reference Data on Radiation Interactions
Last Updated Date: 08/17/2015

NIST is in its seventh decade of providing critically evaluated, comprehensive databases of cross-section information for ionizing photons (x and … more

Accelerator Facilities
Last Updated Date: 08/17/2015

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

National and International Standards for X-ray Security Screening Applications
Last Updated Date: 08/17/2015

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

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