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- W594825631 abstract "method of further improvement of the algorithm is briefly described, and examples of new Monte Carlo data to aid the improvement are shown. An outline and some examples of application are also described of a semiem- pirical model for multilayer absorbers. 1. Introduction Because of short path-lengths of electrons in matter, electron beams used forradiation processing give doses that change rapidly as a function of depth. Thissituation sharply contrasts with almost uniform absorbed-dose distributions givenby Co-60 gamma-rays, which is another type of radiation cornmonly used for ra-diation processing. In using electron beams, therefore, it is important to heweaccurate knowledge of the depth-dose profile as a function of electron energyand al)sorber atomic-number. There are three important elementary processes electrons experience in their pas-sage through matter: (1) energy loss by collision with atornic electrons, (2) ener-gy loss by radiative process (bremsstrahlung emission) in the Coulomb field ofatomic nuclei and (3) elastic scattering by the Coulomb field of atoms (the cu-mulative effect of this is called multiple scattering). Each elementary processand the cumulative effect of each can be described by analytic formulas. How-ever, these formulas neglect influences of the other elementary processes, and areapplicable only to absorbers of thicknesses smal1 compared with the range of inci-dent electrons in matter. For 1arger thicknesses we cannnot neglect mutual influences of the differentprocesses, so that the problem of the passage of electrons through thick layers" @default.
- W594825631 created "2016-06-24" @default.
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- W594825631 date "1993-02-27" @default.
- W594825631 modified "2023-09-25" @default.
- W594825631 title "Semiempirical Models for Depth-Dose Curves of Electrons in Matter : An Introductory Review" @default.
- W594825631 hasPublicationYear "1993" @default.
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