[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-26-12-2022-66

Title : PHOTON-ATOM INTERACTION AND SUBSEQUENT PROCESSES IN X-RAY ENERGY REGION- THEORETICAL ASPECT
Gurjot Singh, U.S. Yadav

Abstract :

This chapter covers the theoretical approach of photon-atom interaction and subsequent inner shell vacancy decay processes. The foremost interaction processes, viz., photoionisation and scattering processes have been discussed. The near edge processes, viz., resonant Raman scattering (RRS) is also explained. These processes become significant at the incident photon energies in the vicinity of the ionization threshold of the target atom. The X-ray diffraction process is explained. The powder XRD gives information about the crystal lattice dimensions, which is further used to identify the chemical phase of the element present in the sample.