Physics Portal - OverviewPhysics research at NIST includes everything from improving the safety of medical radiation procedures to developing future "quantum information" technologies that generate unbreakable codes. NIST provides the measurements, standards, and technical expertise scientists and industries need to push the limits of the fundamental properties of nature. Subject Areas
Programs and Projects
International Comparison of Lu-177
There has been increasing interest during the past 10 years in the use of 177 Lu for radionuclide-based radiotherapy for certain types of cancers. … more
Standards for Clinical Radionuclide Calibrators
In nuclear medicine clinics, activity measurements are typically made using commercially available radionuclide calibrators which incorporate a … more
High-Dose Dosimetry Uncertainty Tables
The high-dose dosimetry program supports radiation-processing applications by assuring that the absorbed dose to the product, often prescribed or … more
Micelle Effects in Liquid Scintillation Counting
Commercially available scintillates (often referred to by manufacturers as “cocktails”) for liquid scintillation (LS) counting … more
A Study of the Irradiation-Temperature Coefficient for Alanine Film and Pellet Dosimeters at Elevated Temperature
Correcting the response of a dosimeter for the average temperature during irradiation processing improves the accuracy of the dose … more
High-Dose Dosimetry
The activities described here support the application of high-dose, high-energy ionizing radiation for a variety of industrial processes. … more Instruments
Infrared reference integrating sphere (IRIS)
An integrating-sphere system has been designed and constructed for the measurement of multiple optical properties in the infrared spectral range. … more
Synchrotron Ultraviolet Radiation Facility SURF III
The Synchrotron Ultraviolet Radiation Facility SURF III is operated by the National Institute of Standards and Technology NIST as a stable light … more
Bidirectional optical scattering facility
Goniometric optical scatter instrument (GOSI) The bidirectional reflectance distribution function (BRDF) quantifies the angular distribution of … more
Spectrally tunable lighting facility
Solid-state lighting (SSL) is increasingly being introduced into the market and it is expected that many of the light sources currently used for … more
Continuous-wave terahertz spectrometer
The continuous-wave terahertz spectrometer makes use of two near-infrared lasers. The first laser is a fixed-frequency cw ring Ti:Sapp laser … more
Facility for spectroradiometric calibrations (FASCAL)
The FASCAL has been in continuous operations since 1970s for the calibrations of spectral radiance of sources. The measurements are performed by … more Software
Electron holography
An electron hologram is a fringe modulated image containing the amplitude and phase information of an electron transparent object. The HolograFREE … more
SCATMECH
SCATMECH is an object-oriented C++ class library developed to distribute models for light scattering applications. Included in the library are … more
Modeled integrated scattering tool (MIST)
The MIST program has been developed to provide users with a general application to model an integrated scattering system. The program performs an … more
NIST's Integrated colony enumerator (NICE)
Enumeration of bacterial colonies on an agar plate is simple in concept, but automated colony counting is difficult due to variations in colony … more
Noncollinear phase matching in uniaxial and biaxial crystals
Although significant work has been done to characterize collinear phase matching and to present many of its applications, noncollinear phase … more
FPGA-based multicoincidence recipe and software
The Data Acquisition Platform project allows one to build their own data acquisition instruments that collect and, if necessary, statistically … more |
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