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Physics Programs & Projects

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Towards a Neutron Microscope
Last Updated Date: 07/23/2013

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

Pushing and Understanding the Limits of Spin-Exchange Optical Pumping of He-3
Last Updated Date: 07/23/2013

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

Precision Measurement of Radiative Neutron Decay Branching Ratio and Energy Spectrum
Last Updated Date: 07/23/2013

Although neutron decay is typically considered as a three-body process, in the radiative correction it is always accompanied by … more

Neutron Imaging for Advanced Catalyst Development and Durability Studies
Last Updated Date: 07/22/2013

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

Neutron Detector Replacement Program
Last Updated Date: 07/22/2013

The Department of Homeland Security/Domestic Nuclear Detection Office (DHS/DNDO) is pursuing a course to transform 3 He alternative technologies … more

Measurement of the Electron-Antineutrino Correlation in Neutron Decay
Last Updated Date: 07/22/2013

The angular correlation between the beta electron and antineutrino in nuclear beta decay α is the least well-known of the group of neutron decay … more

Magnetically Trapped Neutron Lifetime Experiment
Last Updated Date: 07/22/2013

The decay of the free neutron is the simplest nuclear beta decay and is the prototype for all charged current semi-leptonic weak interactions.  … more

High-Efficiency Neutron Detection and Spectroscopy
Last Updated Date: 07/22/2013

Precise knowledge of the fast neutron spectrum and fluencies is essential for several experimental endeavors requiring the low-background of the … more

Alpha-gamma Counting for High Accuracy Fluence Measurements
Last Updated Date: 07/22/2013

Neutron fluence is measured by counting gamma-rays from the reaction n+ 10 B® 4 He+ 7 Li + g(478KeV) with a calibrated gamma detector. The gamma … more

Advanced Neutron Imaging Facility
Last Updated Date: 07/22/2013

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

Frequency Conversion Interfaces for Photonic Quantum Systems
Last Updated Date: 07/02/2013

Optical frequency conversion, in which the color of light is changed, is a process that has numerous applications in physics and technology.  For … more

Nanoplasmonics and Three-Dimensional Plasmonic Metamaterials
Last Updated Date: 06/28/2013

Metamaterials are tailor-made photonic composites--combinations of materials designed to achieve optical properties not seen in nature. The … more

Electron Beam Ion Trap (EBIT) Facility
Last Updated Date: 06/06/2013

The NIST EBIT Facility is used to investigate the science and applications of highly charged ions.

High-Resolution Atomic Spectroscopy
Last Updated Date: 06/06/2013

Accurate measurements of atomic transitions using diffraction grating spectrographs, Fourier transform spectrometers, and laser spectroscopy. more

Atomic Spectroscopy Data Center
Last Updated Date: 06/06/2013

Critical compilations of atomic energy levels, transition wavelengths, and transition probabilities. Online databases. more

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