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Radioactivity
Gamma radiation
thickness of half-value layer (thickness necessary to half-reduction of radiation intensity)
d
1/2
=
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
linear attenuation coefficient
μ =
1/m
x
1/m
1/cm
1. Define values of all variables, besides sought quantity
2. Change units if necessary
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