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Physics Programs & Projects

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Standards for Clinical Radionuclide Calibrators
Last Updated Date: 08/04/2015

NIST maintains a collection of dose calibrators and develops and reports on secondary activity standards for imaging and therapeutic nuclides.

Micelle Effects in Liquid Scintillation Counting
Last Updated Date: 08/04/2015

Liquid scintillation counting (LSC) techniques underlie many of the primary activity measurements at NIST and other national metrology institutes. … more

High-Resolution X-ray Spectroscopy
Last Updated Date: 08/04/2015

We are pursuing a program of x-ray spectroscopy of highly-charged ions and plasmas using custom-designed and constructed curved crystal … more

Enhanced X-Ray Imaging
Last Updated Date: 08/04/2015

This project pursues enhanced x-ray image acquisition and analysis methods that are applicable to, for example, security and medical applications … more

Vision science
Last Updated Date: 08/03/2015

The Vision Science program was established to develop new photometric and colorimetric standards based on vision science to facilitate development … more

Electron-Beam Irradiation of Solar Cells
Last Updated Date: 07/29/2015

The Dosimetry Group operates a system capable of performing electron beam processing, which consists of a Van de Graaff electron accelerator and a … more

Spectral irradiance and radiance responsivity calibrations using uniform sources (SIRCUS)
Last Updated Date: 07/27/2015

SIRCUS is a reference facility for the calibration of detectors and radiometers for spectral irradiance responsivity and spectral radiance … more

New Manganese Sulfate Bath
Last Updated Date: 07/27/2015

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

Fabry-Perot Displacement Interferometry
Last Updated Date: 07/27/2015

High-resolution Fabry-Perot interferometry is being developed and employed for demanding applications in mechanical displacement metrology.

Micro- and nano-optomechanical systems
Last Updated Date: 07/27/2015

Light can interact with mechanical systems in interesting and useful ways, not only probing the mechanical motion with spectacular sensitivity, … more

Infrared optical properties of materials and components
Last Updated Date: 07/27/2015

Accurate measurements of the optical properties of materials in the infrared spectral range play an increasingly important role in the aerospace … more

Frequency Conversion Interfaces for Photonic Quantum Systems
Last Updated Date: 07/24/2015

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

Wide-Angle Neutron Polarization Analysis
Last Updated Date: 07/21/2015

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

Continuous Spin-Exchange Optical Pumping in High Flux Neutron Beams
Last Updated Date: 07/21/2015

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

Neutron Source Strength Calibrations
Last Updated Date: 07/21/2015

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

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