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The National Institute of Standards and Technology operates two spectral comparator facilities, both of which are used to provide detector calibrations from the
At the heart of nanotechnology is the need to create nanostructures, which are material structures whose dimensions are in the nanometer scale. Typically
The semiconductor industry requires sub-nanometer, 3-dimensional quantitative elemental mapping of materials, nanoscale structures, and devices with high
To fabricate, measure, and model solid state implementations of atomically precise devices. Develop a robust infrastructure to fabricate prototype few-atom
NIST scientists are developing a highly accurate primary standard for pressure in the range 2 MPa to 7 MPa based on fundamental physical properties of helium
Atomic-force microscopy is a reference method for traceable and correlative measurements of nanostructures. The Nanostructure Fabrication and Measurement Group
The Alpha-Gamma device is a totally-absorbing neutron detector that has been used to measure the absolute neutron fluence of a cold, monoenergetic neutron beam
The National Institute of Standards and Technology (NIST), Radioactivity Group, and the National Physical Laboratory (NPL) of the UK, exchanged 210 Pb solution
Measurements of radium isotopes in the naturally-occurring radioactive decay chains (i.e., 235 U, 238 U, and 232 Th) are exceedingly important for various
Members of the Radioactivity Group (RG) have been actively collaborating with statisticians in the NIST Statistical Engineering Division to identify new tools
Ni-63 is of considerable interest and importance in radionuclidic metrology as well as for radiation protection surveillance around nuclear facilities.
Collaboration on investigating the thermodynamics of radon binding with a new and novel class of cryptophane molecules was completed with researchers from the
A new standard solution of 243Am, an important radionuclide for the US and international environmental-measurements communities, was developed and disseminated
Since the 1950s, the NIST Radioactivity Group has employed standardized 5 mL borosilicate glass ampoules for ionization chamber measurements and high-resolution
The construction of a new primary calibration facility for air kerma measurements has been completed. It delivers a collimated 137 Cs gamma-ray beam in which
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
Liquid scintillators have been at the heart of radiation measurements at NIST for decades. NIST scientists have pushed the limits of liquid scintillation-based
The high-dose dosimetry program supports radiation-processing applications by assuring that the absorbed dose to the product, often prescribed or limited by
NIST continues to be deeply involved with measurements and evaluations of neutron cross section standards. NIST maintains a limited experimental effort focused
Standard-sized ampoules for radioactive solution standards have been employed by the National Institute of Standards and Technology (NIST) for the past 70 years
Primary activity standards for radionuclides form the foundation for the many products and services of the Radioactivity Group and serve as ground-truth for