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Physics Programs & Projects

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Reflectance Measurements of Human Skin
Last Updated Date: 08/17/2015

The purpose of this human subjects study is to collect high-quality measurements of the reflectance spectrum of human skin and assess the … more

Dynamic Pressure
Last Updated Date: 08/17/2015

Manufacturing processes by their very nature require a judicious, time-dependent use of pressure and temperature to transform a base material into … more

Hyperspectral Image Projector (HIP)
Last Updated Date: 08/17/2015

Detecting climate change with remote sensing instruments, providing state-of-the-art surveillance imagery for security and defense, or getting the … more

Aperture area measurements
Last Updated Date: 08/17/2015

Radiometric and photometric measurements require defining apertures. The accuracy to which these measurements can be accomplished requires … more

Diffuse Optical Properties of Materials
Last Updated Date: 08/17/2015

Diffuse optical properties are critical parameters for understanding the interaction of light with tissues and other optically diffusive materials. more

Calibration of Beta-Particle Sources and Instruments for Radiation Protection
Last Updated Date: 08/17/2015

A calibration service for protection-level beta-particle sources and instrumentation has been in place at NIST for several years.

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 Air-Kerma Standard for Electronic Brachytherapy
Last Updated Date: 08/17/2015

The Dosimetry Group has developed a new facility for the calibration of the Xoft miniature x-ray source, which provides low-energy x-rays (< 50 … 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

Photon Absorbed-Dose-to-Water Primary Standards
Last Updated Date: 08/17/2015

Computational and experimental studies to obtain correction factors for heat defect, heat transfer and scattering/perturbation for the water … more

Electron and Proton Absorbed-Dose-to-Water Primary Standards
Last Updated Date: 08/17/2015

Work on absorbed-dose standards for particle beams is in progress, with preliminary results obtained for both high-energy electrons (at the NIST … more

Remote Sensing Methods for Imaging Dose to Water
Last Updated Date: 08/17/2015

Calorimetry based upon remote sensing of the temperature field in an irradiated volume would offer distinct advantages over the present approach, … more

Applications of Diagnostic X-ray Spectrometers
Last Updated Date: 08/14/2015

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

High-Dose Dosimetry
Last Updated Date: 08/14/2015

The activities described here support the application of high-dose, high-energy ionizing radiation for a variety of industrial processes. … more

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