Atomic Scattering in the Presence of a Low-Frequency Laser.

In the first four chapters of this thesis we have discussed and extended previous work on non-resonant potential scattering, resonant potential scattering and non-resonant electron-atom scattering in the presence of a low-frequency laser. In the next chapter we have solved the problem of resonant electron-atom scattering in the presence of a low-frequency laser. Chapter 6 deals with the experimental aspects of laser-modified atomic scattering. In chapter 7, we discussed the problem of electron-atom ionising collisions (both resonant and non-resonant) in the presence of a low -frequency laser. In the next chapter we have considered cut-off Coulomb potential scattering in the presence of a low-frequency laser. Because of the long range of the Coulomb potential, the result deviates sharply from that obtained for short range potentials unless, of course, the collision energy is very high. Moreover, we have suggested that the experiments are not reproducible unless the details of the cut-off Coulomb potential are spelled out.