2015 NCNR Annual Report
Abstract
eutrons provide a uniquely effective probe of the structure and dynamics of materials ranging from water moving near the surface of proteins to magnetic domains in memory storage materials.The properties of neutrons (outlined below) can be exploited using a variety of measurement techniques to provide information not otherwise available.The positions of atomic nuclei in crystals, especially of those of light atoms, can be determined precisely.Atomic motion can be directly measured and monitored as a function of temperature or pressure.Neutrons are especially sensitive to hydrogen, so that hydrogen motion can be followed in H-storage materials and water flow in fuel cells can be imaged.Residual stresses such as those deep within oil pipelines or in highway trusses can be mapped.Neutronbased measurements contribute to a broad spectrum of activities including engineering, materials development, polymer dynamics, chemical technology, medicine, and physics.The NCNR's neutron source provides the intense, conditioned beams of neutrons required for these types of measurements.In addition to the thermal neutron beams from heavy water or graphite moderators, the NCNR has two liquid hydrogen moderators, or cold sources.One is a large area moderator and the other is smaller, but with high brightness.These moderators provide long wavelength guided neutron beams for industrial, government, and academic researchers.There are currently 28 experiment stations: 12 provide high neutron flux…
Read the paper
Related studies
- The physics, dosimetry and microdosimetry of boron neutron capture theraphy
- Patient radiation dosimetry in MSCT examinations
- Multiyear Program Plan for the High Temperature Materials Laboratory
- Nuclear structure studies with neutron-induced reactions : fission fragments in the N=50-60 region, a fission tagger for FIPPS, and production of the isomer Pt-195m
- Institutional research and development, FY 1988
- Laboratory Directed Research and Development Program: FY 2025 Completed Projects
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.