ELEMENT

Z

N

A

E₂ = E₁ = E

λ_Rx

σ₂

σ₁

(σ₂ − σ₁)/σ₁

A

MeV

m

cm²

cm²

%

Na

11

12

23

1.072E−03

1.1580E−09

1.07E−24

9.02E−26

1085%

Mg

12

12

24

1.305E−03

9.5135E−10

9.04E−25

7.52E−26

1102%

Al

13

14

27

1.560E−03

7.9605E−10

6.57E−25

6.01E−26

993%

Si

14

14

28

1.840E−03

6.7474E−10

5.30E−25

5.13E−26

932%

P

15

16

31

2.150E−03

5.7745E−10

4.10E−25

4.13E−26

892%

S

16

16

32

2.470E−03

5.0264E−10

3.44E−25

3.60E−26

854%

Cl

17

18

35

2.822E−03

4.3994E−10

2.72E−25

2.94E−26

827%

Ar

18

18

36

3.203E−03

3.8762E−10

2.12E−25

2.37E−26

793%

K

19

20

39

3.607E−03

3.4416E−10

1.99E−25

2.21E−26

802%

Ca

20

20

40

4.038E−03

3.0745E−10

1.70E−25

1.96E−26

767%

Fe

26

30

56

7.110E−03

1.7462E−10

6.77E−26

8.83E−27

667%

Ni

28

30

58

8.330E−03

1.4904E−10

5.46E−26

7.36E−27

643%

Cu

29

34

63

8.979E−03

1.3827E−10

4.62E−26

6.36E−27

626%