NIST logo
NIST Home > Math Programs and Projects 
 

Math Programs & Projects

(showing 76 - 90 of 163)
Radionuclides by Anticoincidence Counting
Last Updated Date: 03/20/2013

The standardization of radionuclides by primary methods is the foundation for all the standards and services provided by the NIST radioactivity … more

Uniaxial Tension Beyond Necking
Last Updated Date: 03/13/2013

This project is developing methods to extract valid tensile stress-strain data out of an ASTM E8-type test beyond the point of necking.

Comparison of Co60 Absorbed Dose for High-Dose Dosimetry
Last Updated Date: 03/13/2013

NIST participated in a recent international comparison of standards for absorbed dose to water for 60 Co gamma radiation at radiation-processing … more

Dose/Dose-Rate Effects in Alanine Dosimetry
Last Updated Date: 03/13/2013

Check standards are used by the NIST Ionizing Radiation Division to monitor the performance of the alanine dosimetry system that is central to its … more

Applications of NIST Alanine/EPR Dosimetry to the Irradiation of Blood and Blood Products
Last Updated Date: 03/13/2013

At present, irradiation of blood products with ionizing energy is the only procedure known to prevent transfusion-associated graft-versus-host … more

Advanced X-ray Systems for the Detection of Special Nuclear Materials
Last Updated Date: 03/13/2013

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 Standards for Cargo and Vehicle Screening
Last Updated Date: 03/13/2013

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

New Reference Standards for Digital Mammography
Last Updated Date: 03/13/2013

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

National and International Standards for X-ray Security Screening Applications
Last Updated Date: 03/13/2013

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 … more

Air Kerma Measurements in High Energy X-ray Beams
Last Updated Date: 03/13/2013

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

Small-Field Therapy Dosimetry Using Alanine/EPR
Last Updated Date: 03/13/2013

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

Absorbed Dose to Water and Air Kerma Calibrations in Co-60 Therapy Level Gamma-Ray Beams
Last Updated Date: 03/13/2013

Three dosimetry calibration laboratories accredited by the American Association of Physicists in Medicine (AAPM) routinely perform calibrations of … more

Development of a New 137Cs Gamma-Ray Calibration Facility
Last Updated Date: 03/13/2013

The construction of a new primary calibration facility for air kerma measurements has been completed. It delivers a collimated 137 Cs gamma-ray … more

Air Kerma Calibrations in Radiation Protection Level 137Cs and 60Co Gamma Ray Beams
Last Updated Date: 03/13/2013

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

National Air-Kerma Standard for Electronic Brachytherapy
Last Updated Date: 03/13/2013

The Dosimetry Group has developed a new facility for the calibration of the Xoft miniature x-ray source, which provides low-energy x-rays (< 50 … more

Contact
General Information:
301-975-NIST (6478)
inquiries@nist.gov

100 Bureau Drive, Stop 1070
Gaithersburg, MD 20899-1070