Masahiko Hirooka

Theory of Scattering in Three-Particle System and Its Application to Electron-Exciton Scattering

The formulae in the theory of scattering in the three-particle system developed in a previous paper are transformed into those in the new coordinate systems which are appropriate to the practical application of the theory. On the basis of the general theory, the cross section of electron-exciton scattering which has recently been measured by Otsuka and his coworkers is evaluated in the low-energy limit of incident electron. It has been found that the theoretical result is consistent with their experimental ones.

Phase of radiation from stimulated emission

With the help of the quantum theory of radiation, it is shown that the stimulated radiation from an atom has the same direction and phase dependence as the incident stimulating radiation.