Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-28T03:44:18.894Z Has data issue: false hasContentIssue false
  • English
  • Français

Double Bent Crystal Monochromator for High Resolution Neutron Powder Diffraction

Published online by Cambridge University Press:  14 November 2013

P. Mikula ,
M. Vrána ,
J. Šaroun ,
B.S. Seong  and
W. Woo
P. Mikula
Affiliation:
Nuclear Physics Institute ASCR, v.v.i., 25068 Řež, Czech Republic
M. Vrána
Affiliation:
Nuclear Physics Institute ASCR, v.v.i., 25068 Řež, Czech Republic
J. Šaroun
Affiliation:
Nuclear Physics Institute ASCR, v.v.i., 25068 Řež, Czech Republic
B.S. Seong
Affiliation:
Neutron Science Division, Korea Atomic Energy Research Institute, 1045 Daedok daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
W. Woo
Affiliation:
Neutron Science Division, Korea Atomic Energy Research Institute, 1045 Daedok daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea
Get access Rights & Permissions [Opens in a new window]

Abstract

Recent results of focusing and reflectivity properties of the dispersive double-bent-crystal monochromator have shown that it could be succesfully used in high resolution neutron diffraction experiment. By using a standard polycrystalline sample of α-Fe, the resolution of the diffraction performance in the vicinity of the scattering angle 2θ S = 90o for the neutron wavelength λ= 0.162 nm was tested in detail. It has been found that for thin (1.3 mm) bent second crystal the angular resolution represented by FWHM of diffraction profiles was 1x10−3 rad for 211 and 200 reflections and about 3x10−3 rad for 220 reflection.

Keywords

neutron diffractiondispersive monochromatorpowder diffraction
Type
Technical Articles
Information
Powder Diffraction , Volume 28 , Supplement S2 , September 2013 , pp. S351 - S359
Copyright
Copyright © International Centre for Diffraction Data 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Kulda, J. (1984). “A novel approach to dynamical neutron diffraction by a deformed crystal,” Acta Crystallogr., Sect. A: Found. Crystallogr. 40, 120–126.Google Scholar
Mikula, P., Kulda, J., Vrána, M. and Chalupa, B. (1984). “A Proposal of a Highly Efficient Double Crystal Monochromator for Thermal Neutrons,” J. Appl. Crystallogr. 17, 189–195.CrossRefGoogle Scholar
Mikula, P., Chalupa, B., Kulda, J., Vrána, M., Sedláková, L. and Michalec, R. (1985). “An Experimental Test of a Double-Crystal Monochromator for Thermal Neutrons Based on Two Bent Silicon Crystals,” J. Appl. Crystallogr. 18, 135–140.Google Scholar
Mikula, P., Kulda, J., Lukáš, P., Vrána, M. and Wagner, V. (1994). “Bent Perfect Crystals in Asymmetric Diffraction Geometry in Neutron Scattering Experiments,” Nucl. Instrum. Methods Phys. Res., Sect. A 338, 18–26.Google Scholar
Mikula, P., Vrána, M., Šaroun, J., Em, V., Seong, B. S. and Woo, W. (2012). “Double bent crystal dispersive arrangement for high resolution diffractometry,” J. Phys.: Conf. Ser. 340, 012014.Google Scholar
Popovici, M. and Yelon, W. B. (1995). “Focusing monochromators for neutron diffraction,” J. Neutron Res. 3, 1–25.Google Scholar