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Gaithersburg

Security: Air-Kerma Measurements in High Energy X-ray Beams

Cargo-inspection systems employ high-energy x-ray beams from accelerators. These systems are designed to detect potential threats that may be present in cargo

Calibrations: Portable Manganese Sulfate Bath

NIST also operates a portable Manganese Sulfate bath that is smaller than the primary bath. The latter feature allows it to measure the emission rate of sources

Security (archive): X-ray Systems for Cargo and Vehicle Inspection Systems

The Dosimetry Group provides support to the Department of Homeland Security (DHS) in their evaluation of cargo and vehicle inspection systems. Our support for

Documentary Standards: X-ray Security Screening Applications

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 screening efforts

Security: Standards Development for Detection of Illicit Trafficking of Radioactive

The National Institute of Standard and Technology (NIST) is working in the development of ANSI/IEEE and IEC standards for the detection of illicit trafficking

Imaging: Characterization of Porous Transport Media for Hydrogen Fuel Cells

Efficiently managing water transport in proton exchange membrane fuel cells (PEMFCs) is critical to the performance, cost, and durability in order for this

The Polyvalent Gold Nanoparticle Conjugate Material Synthesis, Biodiagnostics, and Intracellular Gene Regulations

Fri, Apr 29 2011

Over the past decade we have developed methods for modifying nanoparticles with oligonucleotides and explored how they

timeline of neutron detector image spatial resolution

Imaging: Evolution of Neutron Image Detector Spatial Resolution

Measuring the through-plane water content in a hydrogen fuel cell is critical to understanding this complicated heat and mass transport environment, where the

Basic Metrology: Dose/Dose-Rate Effects in Alanine Dosimetry

Check standards are used by the NIST Radiation Physics Division to monitor the performance of the alanine dosimetry system that is central to its high-dose

Smart Grid Panel Agrees on Standards and Guidelines for Wireless Communication, Meter Upgrades

April 19, 2011

Gaithersburg, Md. – The governing board of the public-private Smart Grid Interoperability Panel (SGIP) has voted in favor of a new standard and a set of

Comparison: Co-60 Absorbed Dose for High-Dose Dosimetry

NIST participated in an international comparison of standards for absorbed dose to water for 60Co gamma radiation at radiation-processing dose levels organized

High Flux Backscattering Spectrometer (HFBS)

The NCNR backscattering spectrometer is one of the highest intensity instruments of its kind. It enables very high energy resolution studies of the low

Imaging: Neutron Tomography of Hydrogen Storage Bed

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

Imaging: Neutron Imaging of Lithium and Alkaline Batteries

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. Neutron imaging has

Calibration Services: Low-Energy Photon Brachytherapy Sources

Small radioactive "seed" sources used in prostate brachytherapy, containing the radionuclides 103Pd, 125I, or 131Cs, are calibrated in terms of air-kerma

Basic Metrology: Neutron Cross Section Standards

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

Administration Releases Strategy to Protect Online Consumers and Support Innovation and Fact Sheet on National Strategy for Trusted Identities in Cyberspace

April 15, 2011

WASHINGTON, DC – Today, the Obama Administration released the National Strategy for Trusted Identities in Cyberspace (NSTIC), which seeks to better protect

American Chemical Society Landmark Designation of NIST

NIST'S First Century For one hundred years, scientists and engineers at the National Institute of Standards and Technology, formerly the

Calibrations: Neutron Device Calibrations

NIST provides the national reference for the calibration of neutron radiation detectors used for personnel protection and for neutron personnel dosimeters.

Basic Metrology: Primary Standards for Radionuclides

Primary activity standards for radionuclides form the foundation for the many products and services of the Radioactivity Group and serve as ground-truth for

Basic Metrology (Archive): Standardization of Am-243

A new standard solution of 243Am, an important radionuclide for the US and international environmental-measurements communities, was developed and disseminated

Basic Metrology (Archive): New Standardization of Ra-228

Measurements of radium isotopes in the naturally-occurring radioactive decay chains (i.e., 235U, 238U, and 232Th) are exceedingly important for various

Calibration Service: Air-Kerma Calibrations in the NIST Radiation Protection Level ¹³⁷Cs and ⁶⁰Co Gamma-Ray Radiation Beams

The NIST Dosimetry Group of the Radiation Physics Division maintains and disseminates the national measurement standard for air-kerma (dose in air) from 137Cs