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Instrument 4B

For more information, contactInstrument Scientist: John Ankner, anknerjf@ornl.gov, 865.576.5122 Instrument Scientist: Jim Browning, browningjf@ornl.gov, 865.241.3905 Scientific Associate: Candice Halbert, halbertce@ornl.gov, 865.574.9255 http://neutrons.ornl.gov/instruments/SNS/LR The Liquids Reflectometer features a horizontal sample geometry and thus can accommodate air/liquid surfaces in addition to air/solid and liquid/solid interfaces.

Active vibration isolation minimizes capillary-wave production by the external environment. Data rates and Q range covered at a single scattering angle setting will be sufficiently high to permit real-time kinetic studies on many systems. Time- resolved experiments include investigations of chemical kinetics, solid- state reactions, phase transitions, and chemical reactions in general.

Applications The Liquids Reflectometer is useful for a wide range of science. Current areas of interest include biomaterials, polymers, and chemistry involving thin layers of surfactants or other materials on the surfaces of liquids, such as cell-membrane analogs.

These systems provide a flexible platform to study structure-property relationships at the boundary between hard and soft matter, with applications in biomimetics, bio- sensing, and bio-compatible films; hydrogen storage and fuel cells; and polymers.

05-03086F/gim Source- to-sample distance 13.6 m Sample- to-detector distance 1.5 m Detector size 20 x 20 cm2 Detector resolution 1.3 x 1.3 mm2 Moderator Coupled supercritical hydrogen Bandwidth = 3.5 Wavelength range 2.5 < < 17.5 Q range (air/ liquid) 0 -1 < Q < 0.3 -1 Q range (air/ solid) 0 -1 < Q < 0.3 -1 Minimum reflectivity 1 x 10-7 Specifications March 2010 Status: Operational Liquids Reflectometer goniostat.

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