I3.4. Radioactive permeability
Radioactive permeability is observed at energy levels 60 keV,26 keV, 20,7 keV, 17.7 keV and 6 keV. I_0, I_x, (I_x/I_0 ) and µ values of the samples procured at these energy levels are given in Table 7.
Table 7
The control sample being completely prepared with onion skin and peanut shell, its radioactive permeability is observed to be the best at energy level 6 keV (99.5%). Samples with fly ash additives usually cannot retain sufficient γ beams at energy levels 60 keV and 26 keV. However, they give better results at 20.7 keV and lower levels. When additive ratios of pumice, perlite and barite-added samples increase, it is seen that their radiation permeability values decrease. This situation is pretty interesting for pumice and perlite although it is expected for barite. It can be said that the foregoing trend may be caused by the vacuolar structure of pumice and perlite. However, the chemical structures of those two minerals may also have contribution in this respect. It is observed that barite-added samples absorb almost all of the applied radiation, whereas, pumice and perlite-added samples do not absorb the radiation, that well. However, the latter can be used as coating material in offices which are exposed to a lot of radiation. Moreover, it can, also, be used for the radiation insulation of walls in the radiation units of hospitals.
The test results show that the correct combination of natural materials may render improvements compared to conventional ones. Besides, samples with barite have low radioactive permeability. They are more suitable for places in which there is more radioactive effect. They should be preferred for walls and coverings of medical buildings [7]. Thus, harmful effects of radioactivity can be decreased.
I3.4. Radioactive permeabilityRadioactive permeability is observed at energy levels 60 keV,26 keV, 20,7 keV, 17.7 keV and 6 keV. I_0, I_x, (I_x/I_0 ) and µ values of the samples procured at these energy levels are given in Table 7.Table 7The control sample being completely prepared with onion skin and peanut shell, its radioactive permeability is observed to be the best at energy level 6 keV (99.5%). Samples with fly ash additives usually cannot retain sufficient γ beams at energy levels 60 keV and 26 keV. However, they give better results at 20.7 keV and lower levels. When additive ratios of pumice, perlite and barite-added samples increase, it is seen that their radiation permeability values decrease. This situation is pretty interesting for pumice and perlite although it is expected for barite. It can be said that the foregoing trend may be caused by the vacuolar structure of pumice and perlite. However, the chemical structures of those two minerals may also have contribution in this respect. It is observed that barite-added samples absorb almost all of the applied radiation, whereas, pumice and perlite-added samples do not absorb the radiation, that well. However, the latter can be used as coating material in offices which are exposed to a lot of radiation. Moreover, it can, also, be used for the radiation insulation of walls in the radiation units of hospitals.The test results show that the correct combination of natural materials may render improvements compared to conventional ones. Besides, samples with barite have low radioactive permeability. They are more suitable for places in which there is more radioactive effect. They should be preferred for walls and coverings of medical buildings [7]. Thus, harmful effects of radioactivity can be decreased.
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