A trivial question about terms. What should be called "scattering angle" in Bragg's low: theta or 2*theta ?
In my view, the "scattering" angle is 2*theta (the angle between the incident and the scattering directions), while theta is the "reflection" angle (the angle between the incident or diffracted ray and the reflecting crystal planes). However, I hear sometimes calling theta the scattering angle. Is this just a misuse of the term ? Stefano TRAPANI Centre de Biochimie Structurale (CBS) CNRS UMR 5048; UM1; UM2; INSERM UMR 554 29 rue de Navacelles 34090 MONTPELLIER Cedex - France Tel : +33 (0)4 67 41 77 29 Fax : +33 (0)4 67 41 79 13
