Chemistry Programs & Projects | |
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Automated Multi-Sample Ionization Chamber for Radioactivity Standards
Last Updated Date: 03/11/2013 NIST radioactivity standards for gamma-ray emitting radionuclides are maintained as calibration factors for an automated ionization chamber.
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
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
NIST Chemistry Webbook
Last Updated Date: 02/27/2013 The NIST Chemistry WebBook is a site on the Internet ( http://webbook.nist.gov/ ) that provides convenient access to a variety of physical and … more
Virtual Measurements
Last Updated Date: 02/27/2013 Compared with conventional, physical measurements, the cost of computational modeling continues to drop. This has driven many industries to … 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
NIST Work in Support of the Navy Dosimetry Program
Last Updated Date: 02/27/2013 The U.S. Navy uses thermoluminescent dosimeters (TLDs) to monitor personnel for radiation exposure.
Reactivity of Nanoparticle Catalysts
Last Updated Date: 02/26/2013 Transition metal nanoparticle catalysts show great promise as the key enabling breakthrough for the realization of efficient and economical fuel … more
Prediction of Global Warming Potential
Last Updated Date: 02/26/2013 The global warming potential (GWP) of a number of compounds used by U.S. industry is not known or poorly known. Working with the EPA, a set of … more
Thermodynamics of ATP in Solution
Last Updated Date: 02/26/2013 Quantum chemical calculations have proven to be a reliable tool for the prediction of thermodynamics quantities, particularly for smaller organic … more
Density Functional Tight Binding Methods
Last Updated Date: 02/26/2013 Density Functional Tight Binding (DFTB) methods have been shown to be capable of producing reliable molecular structures and energetics at a … more
Traceability for Industrial Irradiator
Last Updated Date: 02/26/2013 U.S. manufacturers have contended for decades that traceability to national standards for industrial irradiation applications is best achieved by … more |
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