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- W42233532 abstract "Spectral distributions of the fluxes of secondary electrons produced by a collimated beam of 60Co γ-rays, inside media such as aluminium and copper for five different angles—30, 60, 90, 120, and 150°—relative to the incident direction of γ-rays, were experimentally determined using a lithium-drifted silicon detector. Targets of the spherical cavity were used, having a circular opening exit on the cavity wall. Secondary electrons inside the cavity were extracted through the exit and absorbed in a silicon crystal. The target wall was of the thickness sufficient to ensure the electron equilibrium inside the cavity. In order to subtract the background due to various sources, dummy targets were also used, which were of the same weight as the spherical targets and of the doughnut shape, for secondary electrons from the dummy targets not to reach the detector. The target and detector assembly was built in a vacuum chamber and the silicon crystal was cooled by liquid nitrogen. The spectra were corrected for the spectral distortion due to the backscattering of incident electrons from silicon crystal, by using the back-scattering data obtained with an air core magnetic spectrometer over the energy range measured (25–1100 keV). The results show that the electron spectra slightly differ between aluminium and copper and remarkably depend on the angles, that is, the higher energy components increase with the decrease of angles. This result is considerably of interest for the reason that the observed spectra are a kind of the black body radiation and was expected to be nearly isotropic." @default.
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- W42233532 date "1968-01-01" @default.
- W42233532 modified "2023-09-23" @default.
- W42233532 title "MEASUREMENTS ON SLOWING DOWN SPECTRA OF SECONDARY ELECTRONS IN ALUMINIUM AND COPPER FROM 60CO γ-RADIATIONS" @default.
- W42233532 doi "https://doi.org/10.1016/b978-1-4832-8312-8.50054-0" @default.
- W42233532 hasPublicationYear "1968" @default.
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