On the radiation shielding effect of Heavy Alloy, we examined a comparative evaluation with lead. Fig.1 shows the attenuation 

rate of γ-ray (Co60) against the change in thickness of Heavy Alloy and lead. The γ-ray (Co60) used for the evaluation this time is that eradiated from relatively a high energy zone, which becomes an issue in the case of nuclear power station. 

This evaluation proves that Heavy Alloy of about 3mm or 7mm thickness has the radiation shielding effect equivalent to lead 

of about 4.5mm or 10mm thickness respectively. Consequently,

 

Heavy Alloy, compared with lead, has 1.5 times shielding effect against γ-ray (Co60).

 

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