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D Chmelevsky

Publications and source records attributed to D Chmelevsky.

23 records · Page 2Linked to original sources
PubMed1977

Computation of microdosimetric distributions for small sites.

Object of this study is the computation of microdosimetric functions for sites which are too small to permit experimental determination of the distributions by Rossi-counters. The calculations are performed on simulated tracks generated by Monte-Carlo techniques. The first part of the article deals with the computational procedure. The second part presents numerical results for protons of energies 0.5, 5, 20 MeV and for site diameters of 5, 10, 100 nm.

Energy Transfer↗
PubMed1975

Concepts of microdosimetry. III. Mean values of the microdosimetric distributions.

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, yC, or the corresponding average of the specific energy without the need to determine the probability distributions, f(y) or f1(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 mum 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.

Energy Transfer↗
PubMed1975

Concepts of microdosimetry II. Probability distributions of the microdosimetric variables.

This is the second part of an investigation of microdosimetric concepts relevant to numerical calculations. Two different types of distributions of the microdosimetric quantities are discussed. The sampling procedures are considered, which lead from the initial pattern of enregy transfers, the so-called inchoate distribution, to the distribution of specific energy and their mean values. The dependence of the distributions of specific energy on absorbed dose is related to the sampling procedures.

Energy Transfer↗
PubMed1975

Concepts of microdosimetry. I. Quantities.

This is the first part of an investigation of microdosimetric concepts relevant to numerical calculations. The definitions of the microdosimetric quantities are reviewed and formalized, and some additional conventions are adopted. The common interpretation of the quantities in terms of energy imparted to spherical sites is contrasted with their interpretation as the result of a diffusing process applied to the initial spatial pattern of energy transfers in the irradiated medium.

Energy Transfer↗