Monte Carlo simulation of beta particle-induced bremsstrahlung doses
It is well known that protection from the external irradiation produced by beta emitters is simpler
than the corresponding shielding of radioactive sources that emit gamma radiation. This is caused by
the relatively strong absorption (i.e. short range) of electrons in different materials. However,
for strong beta sources specific attention should be paid to the bremsstrahlung radiation induced in
the source encapsulation (matrix), especially for emitters with relatively high beta-endpoint energy
(1 MeV) that are frequently used in nuclear medicine. In the present work, the bremsstrahlung
spectra produced in various materials by the following beta emitters, Sr-90 (together with its
daughter Y-90), P-32 and Bi-210, were investigated by Monte Carlo simulations using Geant4 software.
In these simulations, it is supposed that the point radioactive sources are surrounded by
cylindrically shaped capsules made from different materials: Pb, Cu, Al, glass and plastic. For the
case of Y-90...
Source: Journal of Radiological Protection - Category: Physics Authors: D Mrdja, K Bikit, I Bikit, J Slivka, S Forkapic and J Knezevic Source Type: research
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