Article

Radiation and Environmental Biophysics

, Volume 12, Issue 4, pp 321-335

Concepts of microdosimetry

III. Mean values of the microdosimetric distributions
  • A. M. KellererAffiliated withDepartment of Radiology, Radiological Research Laboratory, College of Physicians and Surgeons, Columbia UniversityInstitut für Med. Strahlenkunde der Universität
  • , D. ChmelevskyAffiliated withDepartment of Radiology, Radiological Research Laboratory, College of Physicians and Surgeons, Columbia University

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Summary

This is the last part of an investigation of microdosimetric concepts relevant to numerical calculations. A formula is derived which permits the computation of the dose average lineal energy,\(\bar yD\), or the corresponding average of the specific energy without the need to determine the probability distributions,f(y) orf 1(z). A detailed treatment is given for two cases of practical importance. The first case corresponds to spherical sites with diameters of the order of 1 µm and to neutrons up to 15 MeV. The second case corresponds to microscopic sites which are small enough that the change of the stopping power of charged particles traversing the site can be neglected.