Periodic Table/Cesium/¹³⁷Cs

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¹³⁷Cs

Cesium-137

Radioactive· Half-life: 30.0 y

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

55

Neutrons (N)

82

Mass Number (A)

137

Atomic Mass

136.907089AMU

Spin / Parity

7/2+

Binding E/A

8.184keV

Natural Abundance

Trace / None

Half-life

30.0 y

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

β⁻

100.0%

Decay Chain

¹³⁷CsCesium30.0 y

β⁻100.0%

¹³⁷BaBariumSTABLE

2-step decay chain → stable · Primary path shown

Other Isotopes of Cesium

111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152

Medical Applications

BrachytherapyCs-137

Low-dose-rate brachytherapy

View all radiopharmaceuticals →

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