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Physics Programs & Projects

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Photon Absorbed-Dose-to-Water Primary Standards
Last Updated Date: 03/08/2013

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

International Comparison of Lu-177
Last Updated Date: 03/05/2013

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
Last Updated Date: 03/05/2013

In nuclear medicine clinics, activity measurements are typically made using commercially available radionuclide calibrators which incorporate a … more

High-Dose Dosimetry Uncertainty Tables
Last Updated Date: 03/05/2013

The high-dose dosimetry program supports radiation-processing applications by assuring that the absorbed dose to the product, often prescribed or … more

Small-Field Therapy Dosimetry using EPR
Last Updated Date: 03/05/2013

NIST has an ongoing program in small-field therapy dosimetry studies using alanine/EPR.

Micelle Effects in Liquid Scintillation Counting
Last Updated Date: 03/04/2013

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
Last Updated Date: 03/01/2013

Correcting the response of a dosimeter for the average temperature during irradiation processing improves the accuracy of the dose … more

High-Dose Dosimetry
Last Updated Date: 03/01/2013

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

Electron-Beam Irradiation of Solar Cells
Last Updated Date: 02/27/2013

The Dosimetry Group operates a system capable of performing electron beam processing, which consists of a Van de Graaff electron accelerator and a … more

Advanced X-ray Systems for the Detection of Special Nuclear Materials
Last Updated Date: 02/27/2013

The Dosimetry Group provides support to the Domestic Nuclear Detection Office (DNDO) of the Department of Homeland Security (DHS) for their … more

Comparison of ANSI N42.46 and IEC 62523
Last Updated Date: 02/27/2013

We are undertaking a comparison of the relative performance of ANSI N42.46 and IEC 62523 consensus standards for x-ray cargo and vehicle screening. more

Theoretical Dosimetry and Radiation-Transport Calculations
Last Updated Date: 02/27/2013

The fundamental photon and charged particle interaction data and the radiation transport methods, pioneered and developed at NIST to calculate the … more

Calibration of Low-Energy Photon Brachytherapy Sources
Last Updated Date: 02/27/2013

Small radioactive "seed" sources used in prostate brachytherapy, containing the radionuclide 103 Pd, 125 I, or 131 Cs, are calibrated in … more

The Development of New Reference Standards for Digital Mammography
Last Updated Date: 02/27/2013

New NIST reference mammography beams using a tungsten target and silver, rhodium, molybdenum and aluminum filters at 20 kV to 50 kV have been … more

Characterization of Dosimeters Used in Computed Tomography
Last Updated Date: 02/27/2013

In an effort to both reduce and improve the monitoring of radiation dose delivered to patients during computed tomography (CT) procedures, the … more

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