Abstract
A method is given for calculating the absolute value of primary, secondary and total specific ionization generated by a ionizing particle traversing a given medium. Density effect is taken into account. Numerical results are given for H and He and compared with the existing experimental data. It is shown that primary ionization presents higher relativistic increase (lower density effect), than the total one where the diluition of secondary ionization is felt. Further primary ionization is independent of maximum transferable energy in close collisions which on the contrary influences sensibly ionization of higher generations. Simplified formulae are given where the influence of the physical characteristic of the medium on the phenomenon appears evident and which are apt to be compared with the experimental results.
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