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Radioactivity
Gamma radiation
intensity after absorbent
I
=
W/m
2
x
W/m
2
intensity of γ-quanta before absorbent
I
0
=
W/m
2
x
W/m
2
thickness of absorbent
d =
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
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
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"