Element

Reaction

Half-life (min)

Gamma (KeV)

Activity*

(Number of disintegration/s)

Decay const. λ

Natural abundance %

N14

N14(n, 2n)N13

10

511

6.3

0.0693

99.63

F19

F19(n, 2n)F18

110

511

5906.52

0.0063

100

Cl35

Cl35(n, 2n)Cl34

32.2

511, 145, 1175.8

53.704

0.02153

43

Sc45

Sc45(n, 2n)Sc44

235.2

511, 1157, 1499.63

269,787.43

0.002947

100

Cr50

Cr50(n, 2n)Cr49

42

511, 97.71, 63.1

20,632.8

0.016504

91.68

Fe56

Fe56(n, 2n)Fe53

8.5

511, 377.2

35.73

0.081547

86

Ni58

Ni58(n, 2n)Ni57

2160

511, 127.7, 1378.4

110.468

0.000321

100

Co59

Co59(n, 2n)Co58

102,240

511, 810.73, 863.94

57.049

678 × 10−8

0.5

Cu63

Cu63(n, 2n)Cu62

9.8

511, 675.2, 1129.1

5.597

0.07073

8

Zn64

Zn64(n, 2n)Zn63

38.3

511, 670.2, 962.24

374.532

0.018098

60

Ga69

Ga69(n, 2n)Ga68

68

511, 1077.1, 1884.5

111,907.8

0.010193

20.7

Ge70

Ge70(n, 2n)Ge69

2214

511, 574, 1002, 1349, 1528, 1576

322.702

0.000313

91.68

Rb85

Rb85(n, 2n)Rb84

20

511, 881.48, 1015.85, 1897.35

165.486

0.03466

72.17