1.
Two methods of shielding
a.
Proximate or close method
b.
Remote or barrier method
Factors affecting selection of shielding material
a.
Energy and type of radiation
b.
Problem of weight
ec.
Cost of shielding material
ad.
Structural considerations
Alpha shielding
a.
Alpha blocked in most cases by sheet of paper
b.
Ordinary clothing provides effective means of shielding
against total body exposure
c.
Rubber gloves to protect hands
Beta shielding
a.
Beta particles are more penetrating than alphas - require
special shielding
b.
Selection of shielding material is based on completely absorbing all the particles
c.
Range or distance traveled within the shield is inversely
proportional to density of the shielding material
d.
Secondary gamma rays are produced by the beta particles
impinging on heavy materials
e.
Low-density materials such as aluminum or plastic preferable
for beta shielding
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