  We present the results of a study on relaxation and diffusion processes of
rubidium atoms in a rubidium cell with an internal vapor source. The cell is an
evacuated glass bulb, which is characterized in that the source of atomic
vapors in the form of a metal film Rb is evenly distributed throughout the
inner surface of the bulb, and the paraffin film is uniformly distributed over
the entire area and over the metal surface. By using laser optical pumping, we
performed measurements of the relaxation time and the average number of bounces
of optical pumped rubidium atoms in the bulb. We have measured the adsorption
time of rubidium atoms by paraffin coating and rubidium atoms diffusion
coefficient in paraffin used. A simple model of the pumping and atomic
diffusion processes in the cell is discussed as well.
