Sawan S. Computational methods of dosimetry of high-energy electron radiation in radiation technology.

The empirical regularities of dose distributions of highenergy electron radiation were formalized and the mathematical relations for the calculation of partial derivatives of dose with respect electron energy and depth in the target were obtained. On the basis of these relations, was developed methods for the numerical differentiation of the depth dose distributions which measured by standard methods of dosimetry of electron radiation. Comparison of methods of processing of measurement results was performed and it is shown that the method which uses semiempirical model of absorption of energy of the electron for approximation of measurement results with a satisfactory accuracy to calculate partial derivatives of the dose distribution. Systematic downward bias of values of the practical range of electrons, calculated using the linear approximation of the measurement results of the depthdose distribution was explained. The magnitude error empirical formula have been proposed and, on its basis, the comparison of the dependences of the most probable energy Ep and average energy EAv from the practical range Rp and halfvalue depth R50, were performed. The reasons for the differences between the empirical formulas given in international standards for dosimetry of electron radiation were identified and recommendations for application of these formulas were formed.