2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18220The time evolution of the coherent forward scattering of Synchrotron radiation for resonant nuclei in Brownian motion is studied . Apart from target thickness, the appearance of dynamical beats also depends on $α$ which is the ratio of harmonic force constant to the damping force constant of a harmonic oscillator undergoing Brownian motion.Major change in figures, minor change in text, accepted for publication in Physica BCondensed Mattertext