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Certified Reference Materials (CRMs) are needed to develop and validate method analysis, and also for quality monitoring of established radioanalytical
A bilateral comparison was conducted between NIST and the International Atomic Energy Agency (IAEA) to support international efforts for harmonizing radiation
Comparisons for the national standards of air kerma from therapy level and radiation protection gamma-ray beams were conducted by the NIST and the Bureau
To establish equivalency of activity standards with national metrology institutes (NMIs) around the world and support their declarations of calibration and
The Radiological Traceability Program (RTP) is a Proficiency Testing (PT) program that establishes traceability for the Radiological and Environmental Sciences
The purpose of the N42 data format is to facilitate manufacturer-independent transfer of information from radiation measurement instruments for use in homeland
The purpose of the IEC 62755 standard N42 data format is to facilitate manufacturer-independent transfer of information from radiation measurement instruments
NIST is a key player in the development of ANSI/IEEE, IEC and Technical Capability standards for the detection of illicit trafficking of radioactive materials
The purpose of these test and evaluation protocols is to provide additional information to the published ANSI/IEEE N42 series for homeland security applications
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 screening efforts
The Dosimetry Group operates a system capable of performing electron beam processing, which consists of a Van de Graaff electron accelerator and a sample
Reliable and accurate measurements of radioactivity in natural matrices are critical to key aspects of environmental research, including climate change, air
The performance of individual labs for specific measurements is determined by the use of a proficiency test. Results reported by labs are compared to a
In collaboration with Sandia National Laboratories, electric fields have been imaged using neutrons on the NG6e cold neutron imaging beamline. A proof-of
The Neutron Spin Rotation (NSR) collaboration has developed a neutron spin polarimeter that has allowed the precise measurement of spin rotations at a level of
The decay of the free neutron is the simplest nuclear beta decay and is the prototype for all charged current semi-leptonic weak interactions. The decay
The angular correlation between the beta electron and antineutrino in nuclear beta decay, referred to as the “little a” coefficient, is the least well-known of
We measured the neutron interaction with an atomic field (also known as Schwinger scattering) inside a silicon crystal in order to determine the value of the
Neutron beta-decay is the process in which a neutron is transformed into a proton, electron, and electron antineutrino. This process is well described in the
Neutron beta-decay is typically considered as a three-body process, but it is always accompanied by inner-bremsstrahlung soft photons, n → e − + p + ν e + γ
The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is the first short-baseline reactor neutrino experiment in the United States since the
The "emiT" experiment searched for time-reversal symmetry violation term in neutron beta decay. It did so by measuring electron-proton coincidence events from