Periodic Table/Iodine/¹³⁹I

← 138I140I →

¹³⁹I

Iodine-139

Radioactive· Half-life: 2.28 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

53

Neutrons (N)

86

Mass Number (A)

139

Atomic Mass

138.926493AMU

Spin / Parity

7/2+

Binding E/A

8.071keV

Natural Abundance

Trace / None

Half-life

2.28 s

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

β⁻

100.0%

β⁻n

9.7%

Decay Chain

¹³⁹IIodine2.28 s

β⁻100.0%

β⁻n¹³⁸Xe9.74%

¹³⁹XeXenon39.7 s

β⁻100.0%

¹³⁹CsCesium9.27 min

β⁻100.0%

¹³⁹BaBarium1.38 h

β⁻100.0%

¹³⁹LaLanthanumSTABLE

5-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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