Journal of Applied Crystallography

Volume 31, Part 4 (August 1998)

research papers

J. Appl. Cryst. (1998). 31, 620-624 [ doi:10.1107/S0021889898002672 ]

Absorption Correction for Annular Cylindrical Samples in Powder Neutron Diffraction

D. Schmitt and B. Ouladdiaf

Abstract: Neutron absorption correction coefficients have been calculated numerically for annular cylindrical samples which are highly absorbing materials (1 < R < 30). The angular variation of the absorption factor differs from that of an equivalent full cylinder. As an example, a gain of a factor of 15 in diffracted intensity can be reached at low Bragg angles for R = 18 if an annular cylinder is used instead of a full cylindrical sample holder with the same amount of material.