7. Diatomic line. Consider a line of atoms ABAB... AB, with an A-B bond length of a. The form factors are f₁, fB for ato
Posted: Mon Jul 11, 2022 2:33 pm
7. Diatomic line. Consider a line of atoms ABAB... AB, with an A-B bond length of a. The form factors are f₁, fB for atoms A, B, respectively. The incident beam of x-rays is perpendicular to the line of atoms. (a) Show that the interference condition is nλ = a cos 0, where is the angle between the diffracted beam and the line of atoms. (b) Show that the intensity of the diffracted beam is proportional to f₁-fB1² for n odd, and to f₁ + f² for n even. (c) Explain what happens if f = fB.