Kinetic Theory for a Dilute Gas of Particles

In Table 2 we have collected results for o for certain elements belonging to the same groups in the periodic table. Table 2 contains the numerical values of the total cross section for several elements. The results show that o is not a monotonic function of k for small A:-values but neither a complicated function of k. o contains some maxima and minima which means it ahs an oscillatory character of low energy scatter­ ing of electrons by atoms in the Thomas-Fermi theory.