Periodic Table/Cesium/¹²²Cs

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¹²²Cs

Cesium-122

Radioactive· Half-life: 21.2 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

55

Neutrons (N)

67

Mass Number (A)

122

Atomic Mass

121.916108AMU

Spin / Parity

1+

Binding E/A

8.129keV

Natural Abundance

Trace / None

Half-life

21.2 s

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

β⁺

100.0%

β⁺α

2.0%

Decay Chain

¹²²CsCesium21.2 s

β⁺100.0%

β⁺α¹¹⁸Te2.00%

¹²²XeXenon20.1 h

EC100.0%

¹²²IIodine3.63 min

β⁺100.0%

e+¹²²Te78.0%

EC¹²²Te22.0%

¹²²TeTelluriumSTABLE

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

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

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