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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
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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 2θS = 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 

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References

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