Practical Electron Microscopy and Database

Chapter/Index: Introduction | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Appendix

Introduction of Cross Section of Scatterings

Cross section of scattering measures the probability that an event occurs, given by,               --------------------------------------------- [4477] where N -- Events per volume (sites/cm3)            ni -- Number incident particles per unit area (particles/cm2)            nt -- Number target sites per volume (sites/cm3) Q has units of cm2 and is considered as an effective ‘size’ which the atom presents as a target to incident particles.