Page 300 - Radiation Safety
P. 300
PROTECTION AGAINST EXTERNAL HAZARDS
(SHIELDING)
• Neutrons are uncharged particles and thus can
penetrate matter considerably. Shields use on
neutron is directed towards reducing the energy of
the neutrons to levels that can easily be absorbed.
➢Neutron (< 1 MeV)
A reduction of energy of neutron is best accomplished by collisions
with atoms of light elements, e.g: hydrogen.
➢Neutron (> 1 MeV)
Energy of fast neutrons is best reduced using water and paraffin wax.
20cm of paraffin wax will attenuates 1 MeV fast neutrons by a factor
of 10.
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