Study on the shielding materials for low-energy gamma sources
Photon dosimetry is indispensable in designing an irradiation facilities shielding. Monte Carlo simulation was utilized to investigate the efficiency of relatively new developed clay and Gadolinum (Gd)-doped polymer as a radiation shielding material for low energy gamma sources (Am- and Co-). The...
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| 主要な著者: | , , , , |
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| フォーマット: | Conference or Workshop Item |
| 言語: | English |
| 出版事項: |
2020
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| 主題: | |
| オンライン･アクセス: | http://eprints.unisza.edu.my/1928/1/FH03-FSK-20-39344.pdf http://eprints.unisza.edu.my/1928/ |
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| 要約: | Photon dosimetry is indispensable in designing an irradiation facilities shielding. Monte Carlo simulation was utilized
to investigate the efficiency of relatively new developed clay and Gadolinum (Gd)-doped polymer as a radiation
shielding material for low energy gamma sources (Am- and Co-). The calculated linear attenuation coefficient ()
of Am- and Co- for clay is higher within . % and . % compared to ordinary concrete, respectively. The value
for Gd-doped polymer is higher by a factor of and compared to clay for Am- and Co-, respectively. A thickness
of cm and cm from both clay and concrete were adequate to attenuate almost % incident photons from Am-
and Co-, respectively. The same thickness of cm by Gd-doped polymer could attenuate almost % of Co-
photons. cm thickness of clay and concrete could shield the gamma source dose rate of Am- ( MBq) down to
. Sv/hr, while almost cm needed for Co- source. Gd-doped polymer with thickness of cm could shield
almost % the dose rate from Co- source. For higher energy gamma sources, clay and ordinary concrete need to
be doped with a higher Z element to ensure safety of the radiation. |
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