Page 304 - Radiation Safety
P. 304
PROTECTION AGAINST EXTERNAL HAZARDS
(SHIELDING)
Half Valued Layer (HVL)
Shielding Material and Thickness (cm) Source
Ir-192 Co-60
Concrete TVL 14.74 22.86
HVL 4.82 6.85
Steel TVL 2.90 7.36
HVL 0.87 2.20
Lead TVL 1.62 4.11
HVL 0.48 1.24
Tungsten TVL 1.09 2.62
HVL 0.33 0.79
Uranium TVL 0.93 2.29
HVL 0.28 0.69
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