Nuclide

Decay Type

Branching

T_1/2

Energy of γ ray MeV

Energy of β particles MeV

Emax

Emean

123I

EC

100

13.2 h

0.159

---

---

γ

84

124I

β+

25

4.176 d

0.602

0.722

1.69

2.137

0.82

Ec

75

γ

75

131I

β-

87

8.025 d

0.364

0.6

0.189

γ

82