Abstract:
In this project an attempt has been made, first to present the quantum mechanical
formalism of the interaction of radiation with matter, the photoionisation of an atom and
the photodisintegration of a deuteron. For this purpose we have developed the transition
rates for harmonic perturbations based on the time dependent perturbation theory, in a
way which enables to calculate the probabilities of finding the physical system in
different quantum states, after perturbation is applied. The ejection of an electron from
the ground state of one electron N-dimensional atom by the absorption of radiation of
angular frequency or in other words by the absorption of a photon energy . It is
noticed that as increases the total cross-section, ( ) decreases for N 10 and
increases for N 10, so that ( ) does not change for N=10.
