PHASED ROTATING CRYSTAL AND CHOPPER FOR TIME-OF-FLIGHT NEUTRON SPECTROSCOPY Page: 1 of 57
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LEGAL NOTICE
This report was prepared as an acCount of Government sponsored work Netfer tfhe Unted
Stofee or the Cosmmteeioo nor any poeom acatog ton bhamf of thr Comatteetoo
racy completeness oraefulnes of the Information totaledd In thi ert or thaf the use
of aty inforatoon apparatus method or process disclosed in Ghs report may not infringe
privately owoosd rights or
B Asre es - y liabilities with respect to the use of or for domageoresolting from the
use of any Information apparatus method or process closed do i re includes t ry em
ployee or contractor of the Commission or employee of such contractor to the extent that
such employee or contractor of the Commfeeiot or employee of such contractor prepares
dissemnatee or provides access to any information pursoent to tos employment or contract
with the Commission or his employment with each contractorA Phased Rotating-Crystal and Chopper
for Time-of-Flight Neutron Spectroscopy
0., K. Harling
Battelle Memorial Institute
Pacific Northwest Laboratory
Richland, WashingtonThis document is
PUBLIC LY RELEASABLE
Authorizin Official
Dwa t t /Described is a slow-neutron spectrometer that uses
a rotating single crystal to chop and monochromate the
reactor neutron beam. A high-transmission mechanical
chopper is operated in phase with the rotating crystal
to eliminate undesired crystal reflections, higher order
contamination, and to suppress the background of time-
uncorrelated neutrons. Pulsed neutron beams of high
quality can be obtained from the thermal energy range to
greater than O.5 eV. Energy widths as low as 1% with
burst widths around 7 jsec can be attained at 0.3 eV.
Intensities are adequate for inelastic scattering* This paper is based on work performed under U. S. Atomic Energy
Commission contract AT(45-1)-1830fflF
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Harling, O.K. PHASED ROTATING CRYSTAL AND CHOPPER FOR TIME-OF-FLIGHT NEUTRON SPECTROSCOPY, report, June 1, 1966; United States. (https://digital.library.unt.edu/ark:/67531/metadc1030811/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.