Abstract
From a single set of themes, the theory of RBE has developed a picture of the response of many biological, physical, and chemical systems to radiations of different quality, that depends on a model of the structure of the tracks of nuclear projectiles in condensed matter. Its characterizations arise from the tracks of heavy ions in nuclear emulsions, as extended to accommodate biological cells. Most recently emulsions have been identified whose radiosensitivity changes with radiation quality parallel those of biological cells. From experimentally determined radiosensitivity parameters, the theory predicts response to a range of radiations, and includes synergistic effects of mixed radiation fields, making it possible to calculate the RBE of a mixed field of neutrons and gamma-rays, and to specify the dosimetric measurements required to make these predictions. (auth)
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