Diffuse X-ray scattering from interstitial nitrogen in niobium. I. Huang diffuse scattering

Abstract
The symmetry and strength of the displacement field around N atoms interstitially dissolved in Nb single crystals is determined from Huang diffuse scattering of X-rays. The measurements were performed at various temperatures from -180 to 150 degrees C. The force dipole tensor describing the long-range displacement field has tetragonal symmetry. It shows no temperature dependence within the present accuracy.