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4 Assessment of Technical Programs: Scientific Areas Investigated at the NCNR
Pages 16-21

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From page 16...
... Such measurements, for example, enabled concentration gradients induced by shear stress to be measured in shear-banding fluids. These flow-induced concentration gradients govern and provide desired flow properties in commercial products ranging from shampoos to fluid additives for drag reduction and enhanced oil recovery.
From page 17...
... Importantly, the integrated and complementary instruments of the NCNR CHRNS facility enabled researchers to go beyond static structure and to measure chain dynamics in two polymer-corona regions, which differed significantly, on the same samples using the NSE spectrometer. These are the first measurements of their kind.
From page 18...
... .5 These imply a direct role of spins in the superconductivity and a change in the magnetic exchange energy on entering the superconducting state that leads to a novel incommensurate entwined magnetic/superconducting state called Q-phase. Planned developments of MACS include lowering the background for better signal-to-noise (critical for weak magnetic signals in the quantum spin liquid for example)
From page 19...
... Opportunities and Challenges Biological scientists are regular consumers of beam time at neutron scattering facilities all over the world, and they have long been members of the user community at the NCNR, which has several firstclass instruments suitable for biological experiments. Nevertheless, although biological scientists consume approximately 15 percent of the beam time at the NCNR, only approximately 6 percent of the most highly cited papers that have emerged from the NCNR over the past decade describe work done on biological samples, as determined by the web of Science.6 Consistent with these statistics, the leadership of the NCNR did not indicate that it believed biological science is one of the facility's strong suits.
From page 20...
... The group reports the most precise measurement of the angle -- the dimensionless parameter "a" -- to date following a 15-month data run at the CNR.8 In its experiments using neutron interferometry, the group conducts experiments to observe phase-coherent neutron waves. The group's work on neutrinos is searching for what are dubbed sterile neutrinos, a fourth flavor of this particle such as might explain anomalies such as the reactor neutrino deficit.
From page 21...
... 10 J.S. Nico, NIST, "Recent Results in Neutron Physics," presentation to the panel on July 10, 2018.


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