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Radiation Physics Programs & Projects

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International Comparison of Pu-241
Last Updated Date: 06/27/2012

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

Blind Measurement Comparisons of the USA and UK Pb-210 National Standards
Last Updated Date: 06/27/2012

The National Institute of Standards and Technology (NIST), Radioactivity Group, and the National Physical Laboratory (NPL) of the UK, and the … more

New Standardization of Ra-228
Last Updated Date: 06/27/2012

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

Standardization of Am-243
Last Updated Date: 06/27/2012

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

NIST Laboratory for Quantitative PET-CT Imaging
Last Updated Date: 06/27/2012

As part of a NIST-wide effort to develop a metrological infrastructure for quantitative medical imaging, the Radioactivity Group has recently … more

Secondary Standards for Ra223
Last Updated Date: 06/27/2012

223 Ra is being evaluated as a radiopharmaceutical for the treatment of skeletal metastases.   As an alkaline earth metal, Ra exhibits intrinsic … more

Shellfish Natural Matrix Radionuclide Standard Reference Material 4358
Last Updated Date: 06/27/2012

This Standard Reference Material (SRM) has been developed in cooperation with member laboratories of the International Committee for Radionuclide … more

Radionuclide in Soil Reference Materials
Last Updated Date: 06/27/2012

Consequence management of a radiological incident requires rapid information about the nuclides, amount, dispersion, and speciation for the … more

Separation and Purification of Ra-228 for SRM 4339B
Last Updated Date: 06/27/2012

The US Environmental Protection Agency (USEPA) maximum contaminant level for combined 226 Ra and 228 Ra in drinking water is 5 picocuries (37 mBq) … more

National Technical Nuclear Forensics CRMs
Last Updated Date: 06/27/2012

The U.S. Department of Homeland Security (DHS) is committed to using cutting-edge technologies and scientific talent in its quest to make America … more

The Urgent Requirements for New Radioanalytical CRMs
Last Updated Date: 06/27/2012

A multi-agency workshop was held from 25–27 August 2009, at the National Institute of Standards and Technology (NIST), to identify and prioritize … more

Development of Epoxy Based Ge-68 Standard Phantom Sources
Last Updated Date: 06/27/2012

The use of imaging data for staging of disease, treatment planning, and monitoring of patient response continues to increase. In these types of … more

A Novel Optical Technique for Rapid Detection of Neutrons
Last Updated Date: 06/27/2012

Almost every instrument at the NCNR and other neutron scattering facilities depends on 3 He proportional tubes because of their high efficiency, … more

Advancing Alanine Dosimetry for Small Radiosurgery Fields
Last Updated Date: 06/26/2012

Research is underway to expand the current range (20 Gy to 200 kGy) of alanine dosimetry to include therapy level dosimetry (as low as 1 Gy) for … more

Standard Reference Data on Radiation Interactions
Last Updated Date: 06/26/2012

NIST has nearly five decades of experience in the development of critically evaluated, comprehensive databases of cross-section information for … more

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