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Physics Programs & Projects

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Neutron Cross Section Standards
Last Updated Date: 07/30/2013

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

Calibrated Neutron Sources
Last Updated Date: 07/30/2013

ANSI N42.35 requires 252 Cf neutron sources encapsulated in 1 cm of steel with a fluence of 2x10 4 n/s ±20%. 

Use of Quantum Error Coding in a 4-Blade Neutron Interferometer
Last Updated Date: 07/30/2013

We have designed a new type of neutron interferometer, which will be less sensitive to slow vibrations.

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

Neutron Source Strength Calibrations
Last Updated Date: 07/23/2013

The neutron source calibration facility operated by NIST is a world-class calibration laboratory providing neutron source   calibration services … more

New Manganese Sulfate Bath
Last Updated Date: 07/23/2013

Description: Many neutron sources required by Homeland Security have a lower neutron emission rate than is appropriate for the NIST calibration … 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

Neutron Imaging of Lithium and Alkaline Batteries
Last Updated Date: 07/23/2013

A common topic in energy systems is the need for in situ measurement of the mass transport of light ion species such as hydrogen or lithium.   … more

Continuous Spin-Exchange Optical Pumping in High Flux Neutron Beams
Last Updated Date: 07/23/2013

We collaborated on tests at the Insitut Laue Langevin (ILL) to study the effects of high flux neutron beams on spin-exchange optical pumping … more

Wide-Angle Neutron Polarization Analysis
Last Updated Date: 07/23/2013

The capabilities of many neutron scattering instruments would be greatly enhanced by neutron polarization analyzers that can cover a wide angular … more

Precision Measurement of the Neutron-He3 Incoherent Scattering Length
Last Updated Date: 07/23/2013

The Neutron Interferometer and Optics Facility performed a precision measurement of the n- 3 He incoherent scattering length. Quantum … more

Neutron Tomography of Hydrogen Storage Bed
Last Updated Date: 07/23/2013

Future hydrogen fuel cell vehicles will require hydrogen storage vessels that efficiently store and quickly release the hydrogen fuel.   The … more

Californium Neutron Irradiation Facility
Last Updated Date: 07/23/2013

NIST provides an exposure facility for high neutron fluencies called the Californium Neutron irradiation Facility (CNIF). more

Measurement of the Parity Non-Conserving Neutron Spin Rotation (PNC) in Liquid Helium
Last Updated Date: 07/23/2013

We recently completed a successful run of an experiment to study the strong interaction using weak interaction properties of the neutron. The … more

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