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Gaithersburg

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 Radiation Protection Level Cs-137 and Co-60 Gamma Ray Beams

The Dosimetry Group maintains and disseminates the national measurement standards for air-kerma (exposure) from 137Cs and 60Co gamma-ray beams and for absorbed

photon attenuation cross section measurements

Basic Metrology: Standard Reference Data on Radiation Interactions

NIST is in its eighth decade of providing critically evaluated, comprehensive databases of cross-section information for ionizing photons (x and gamma rays)

Comparisons: International Comparisons for Air-Kerma and Absorbed Dose to Water from Gamma-ray Beams

A bilateral comparison was conducted between NIST and the International Atomic Energy Agency (IAEA) to support international efforts for harmonizing radiation

Basic Metrology (Archive): Blind Measurement Comparisons of the USA and UK Pb-210 National Standards

The National Institute of Standards and Technology (NIST), Radioactivity Group, and the National Physical Laboratory (NPL) of the UK, exchanged 210Pb solution

Comparisons (Archive): International Comparison of Pu-241 Activity

All of the plutonium isotopes, which have a very high biotoxicity, are man-made and result from various nuclear activities. Plutonium-241 is a very low-energy

Comparisons (Archive): Technetium-99m Primary Standardization and International Comparison

Technetium-99m ( 99mTc) is used in two-thirds of all diagnostic nuclear medicine procedures in the United States.

Basic Metrology (Archive): New Statistical Analysis Tools

Members of the Radioactivity Group (RG) have been actively collaborating with statisticians in the NIST Statistical Engineering Division to identify new tools

Basic Metrology: Applications of Diagnostic X-ray Spectrometers

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

New NIST SRM Helps Improve Diagnosis of Huntington's Disease

April 12, 2011

A new Standard Reference Material (SRM) from the National Institute of Standards and Technology (NIST) will help clinical genetics labs accurately diagnose

Free Online Tool Aids Decisions on Fire Sprinkler Systems for Homes

April 12, 2011

For the many states, communities, new-home builders and prospective buyers now mulling over the pluses and minuses of installing residential fire suppression

Sharpened Focus: Improving the Numbers, Utility of Medical Imaging

April 12, 2011

The idea of probing the body's interior with radiation stretches back to experiments with X rays in the 1800s, but more than a century later, images taken with

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