Periodic Table/Iodine/¹³⁷I

← 136I138I →

¹³⁷I

Iodine-137

Radioactive· Half-life: 24.1 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

53

Neutrons (N)

84

Mass Number (A)

137

Atomic Mass

136.918028AMU

Spin / Parity

7/2+

Binding E/A

8.128keV

Natural Abundance

Trace / None

Half-life

24.1 s

Decay Modesoverview · half-life · α · β⁻ · β⁺

β⁻

100.0%

β⁻n

7.5%

Decay Chain

¹³⁷IIodine24.1 s

β⁻100.0%

β⁻n¹³⁶Xe7.51%

¹³⁷XeXenon3.82 min

β⁻100.0%

¹³⁷CsCesium30.0 y

β⁻100.0%

¹³⁷BaBariumSTABLE

4-step decay chain → stable · Primary path shown · branching ratios indicated

Other Isotopes of Iodine

106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147

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