Periodic Table/Samarium/¹⁴⁰Sm

← 139Sm141Sm →

¹⁴⁰Sm

Samarium-140

Radioactive· Half-life: 14.8 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

62

Neutrons (N)

78

Mass Number (A)

140

Atomic Mass

139.918995AMU

Spin / Parity

0+

Binding E/A

8.037keV

Natural Abundance

Trace / None

Half-life

14.8 min

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

β⁺

100.0%

Decay Chain

¹⁴⁰SmSamarium14.8 min

β⁺100.0%

¹⁴⁰PmPromethium9.20 s

β⁺100.0%

¹⁴⁰NdNeodymium3.37 d

EC100.0%

¹⁴⁰PrPraseodymium3.39 min

β⁺100.0%

EC¹⁴⁰Ce51.3%

e+¹⁴⁰Ce48.7%

¹⁴⁰CeCeriumSTABLE

5-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

← Back to SamariumData: IAEA NDS · ENSDF