50

75

100

150

Lead equivalent (mmPb)

Amount of radiation passing through %

0.25

0.35

3.0

10

20

0.35

0.05

1.5

5.5

11

0.40

0.03

1.0

4.5

8.0

0.50

0.01

0.7

3.0

5.5

1.00

-

0.05

0.5

1.0