An empirical formula evaluation of the collision strength for the electrons with atoms and ions

The experimental data and theoretical calculations have been researched for the collision excitation cross section Q, collision strength Ω and rate coefficient R on the electrons with atoms and ions. The empirical formulae of the different types have been compared, analysed and evaluated. These empirical formulae have been given by the strict theoretical model, formulae derivation and programme calculation. A set of values of the Q, Ω and R have been given by means of the calculating results and measuring values, particularly, on the calculating formula parametrization of the collision strength Ω. On the basis of evaluating data, a set of the reasonable and convenient empirical formulae have been recommended