AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
X ray crystal diffraction12/20/2023 The planes of the Crystal should have a spacing of the order of 1 Armstrong. If a crystal consists of a regular and orderly arrangement of atoms. In 1912, Max Von Laue, a German theoretical physicist feet suggested that. Laue Patterns: Laue Method of X ray Diffraction If the path difference between APA’ and BQB’ is an integral multiple of λ, there will be constructive interference and a maximum will be observed. Let AP and BQ be two parallel incident rays that are reflected from points P and Q on the Crystal planes and travel along with PA’ and QB’ respectively. Let a parallel beam of monochromatic X-rays of wavelength λ be incident on the Plane at a glancing angle θ such that the incident rays lie in the plane of the paper. Bragg considered the X-ray diffraction from a crystal as a problem of reflection of X-rays from the atomic planes of the crystal in accordance with the laws of reflection.Ĭonsider a set of parallel atomic planes of the Crystal with Miller Indices, such that the distance between the two successive planes is d. In order to explain the diffraction of x rays, W.L. maxima and minima) in certain directions. These radiations may interfere constructively or destructively producing a diffraction pattern(i.e. The radiation emitted by the electrons is out of phase with each other. But since the atomic dimension are nearly equal to the wavelength of X-Ray. Then the radiated X-ray are in phase with each. If the wavelength of incident radiation is large compared to the dimensions of the Crystal. These Accelerated electrons then emit the radiation of the same frequency as that of incident x-rays in all directions. With the same frequency as that of the frequency of the incident ray and are accelerated. The atomic electrons in the Crystal are sent into vibration. When a monochromatic x-ray incident occurs on a crystal.
0 Comments
Read More
Leave a Reply. |