CFDF – A New Fourier RTOF-Diffractometer for Stress and Powder Diffraction Investigations

Article type: Research Article

Authors: Maayouf, R.M.A. | Abdel-Latif, I.A. | El-Kady, A.S.I. | El-Shafey, A.S. | Khalil, M.I. | El-Shaer, Y.H.

Affiliations: NRC, Atomic Energy Authority, Cairo, Egypt

Note: [] Corresponding author.

Abstract: The present work deals with the results of measurements performed recently with the Cairo Fourier diffractometer facility (CFDF). The CFDF is based on the reverse time-of-flight (RTOF) method and is optimized for neutron diffraction measurements at scattering angle 2θ=90°. The CFDF performance is assessed and the main parameters are given. The neutron guide system attached to the CFDF provides a thermal neutron flux of ∼106n/cm2s at the sample position which is free from fast neutron and gamma-ray background. It has been found, from measurements with different powder samples, that this value of the thermal neutron flux is adequate for neutron diffraction measurements, at scattering angle 2θ = 90° and d-spacing values between 0.7 and 2.5 Å; with 0.52% resolution.

Keywords: fourier diffractometer, stress, powder

DOI: 10.1080/10238169808200038

Journal: Journal of Neutron Research, vol. 6, no. 4, pp. 233-248, 1998