title: Neutron Time-of-Flight Spectroscopy.
abstract: The time-of-flight technique is employed in two of the instruments at the NIST Cold Neutron Research Facility (CNRF). A pulsed monochromatic beam strikes the sample, and the energies of scattered neutrons are determined from their times-of-flight to an array of detectors. The time-of-flight method may be used in a variety of types of experiments such as studies of vibrational and magnetic excitations, tunneling spectroscopy, and quasielastic scattering studies of diffusional behavior; several examples of experiments are discussed. We also present brief descriptions of the CNRF time-of-flight instruments, including theirmodi operandiand some of their more pertinent parameters and performance characteristics.
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: John R D
authors.initials: JR
authors.lastname: Copley
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899.
authors.forename: Terrence J
authors.initials: TJ
authors.lastname: Udovic
keywords: diffusion; hydrogen in metals; inelastic scattering; neutron choppers; neutron inelastic scattering; quasielastic neutron scattering; time-of-flight spectroscopy; tunneling spectroscopy; vibrational spectroscopy