Microdosimetric concepts relevant to HZE-particles

The biological effectiveness of HZE-particles i s determined by the
extreme microscopic concentrations of energy transfer in the
vicinity of the particle tracks. The concept of linear energy
transfer fails to describe this situation adequately. The more
rigorous microdosimetric concepts are presented. A simplified
treatment, based on the radial distribution of energy around the
track core, is then considered.