Fig. 17.

Hit-size effectiveness functions E(z) for six different biological endpoints derived from measurements with various types of radiations with LETs ranging from 1 to 350 keV μm⁻¹. Specific energy distributions refer to a target critical volume (TCV) of 1 μm. Values of E(z) represent the probability of quantal response to a hit of size z, computed as the ratios of the relative number of responding cells per exposed cell to the relative number of hits per exposed cell, calculated for each z interval. Approximate values for which quantal response probabilities E(z) are 0.02, 0.50, and 0.98 are indicated on the graph.

Reprinted from Sondhaus et al. (1990) with permission of Wolters Kluwer Health, Inc