Periodic Table/Samarium/¹⁴²Sm

← 141Sm143Sm →

¹⁴²Sm

Samarium-142

Radioactive· Half-life: 1.21 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

62

Neutrons (N)

80

Mass Number (A)

142

Atomic Mass

141.915209AMU

Spin / Parity

0+

Binding E/A

8.063keV

Natural Abundance

Trace / None

Half-life

1.21 h

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

β⁺

100.0%

e+

5.0%

Decay Chain

¹⁴²SmSamarium1.21 h

β⁺100.0%

e+¹⁴²Pm5.00%

¹⁴²PmPromethium40.5 s

β⁺100.0%

e+¹⁴²Nd77.1%

EC¹⁴²Nd22.9%

¹⁴²NdNeodymiumSTABLE

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

Other Isotopes of Samarium

128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168

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