Polycapillary optics based neutron focusing for small sample neutron crystallography.

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This work presents preliminary measurements designed to explore a new approach to neutron diffraction that is somewhat analogous to the pseudo-Laue technique, except that instead of using a broad energy (wavelength) bandwidth it uses a broad angular bandwidth. We have used a polycapillary focusing optic to focus neutrons from a monochromatic beam (using the BT-8 spectrometer on the NIST research reactor) and from a polychromatic beam at a pulsed spallation source (the Intense Pulsed Neutron Source, IPNS at Argonne National Laboratory) into a small, intense spot and have carried out preliminary diffraction measurements. Using the single crystal diffraction (SCD) facility ... continued below

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7 pages

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Gibson, W. M.; Chen-Mayer, H. H.; Mildner, D. F. R.; Prask, H. J.; Schultz, A. J.; Youngman, R. et al. February 21, 2002.

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Description

This work presents preliminary measurements designed to explore a new approach to neutron diffraction that is somewhat analogous to the pseudo-Laue technique, except that instead of using a broad energy (wavelength) bandwidth it uses a broad angular bandwidth. We have used a polycapillary focusing optic to focus neutrons from a monochromatic beam (using the BT-8 spectrometer on the NIST research reactor) and from a polychromatic beam at a pulsed spallation source (the Intense Pulsed Neutron Source, IPNS at Argonne National Laboratory) into a small, intense spot and have carried out preliminary diffraction measurements. Using the single crystal diffraction (SCD) facility on IPNS, diffraction of a 3{sup o} convergent beam from an alpha quartz crystal showed six diffraction beams in the 1-5{angstrom} wavelength bandwidth transmitted by the optic. The diffraction spots showed an intensity gain of 5.8 {+-} 0.9 compared to a direct beam diffracting from the same sample volume as that illuminated by the convergent beam.

Physical Description

7 pages

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  • 51st Annual Denver X-ray Conference, Denver, CO (US), 07/30/2001--08/03/2001

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  • Report No.: ANL/IPNS/CP-106962
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 793054
  • Archival Resource Key: ark:/67531/metadc737508

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  • February 21, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • March 23, 2016, 11:31 a.m.

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Gibson, W. M.; Chen-Mayer, H. H.; Mildner, D. F. R.; Prask, H. J.; Schultz, A. J.; Youngman, R. et al. Polycapillary optics based neutron focusing for small sample neutron crystallography., article, February 21, 2002; Illinois. (digital.library.unt.edu/ark:/67531/metadc737508/: accessed October 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.