Periodic Table/Samarium/¹³¹Sm

← 130Sm132Sm →

¹³¹Sm

Samarium-131

Radioactive· Half-life: 1.20 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

62

Neutrons (N)

69

Mass Number (A)

131

Atomic Mass

130.946022AMU

Spin / Parity

5/2+

Binding E/A

7.843keV

Natural Abundance

Trace / None

Half-life

1.20 s

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

β⁺

100.0%

β⁺p

Decay Chain

¹³¹SmSamarium1.20 s

β⁺100.0%

β⁺p¹³⁰Nd

¹³¹PmPromethium6.30 s

β⁺100.0%

¹³¹NdNeodymium25.4 s

β⁺100.0%

β⁺p¹³⁰Ce

¹³¹PrPraseodymium1.50 min

β⁺100.0%

¹³¹CeCerium10.3 min

β⁺100.0%

¹³¹LaLanthanum59.0 min

β⁺100.0%

¹³¹BaBarium11.5 d

β⁺100.0%

¹³¹CsCesium9.69 d

EC100.0%

¹³¹XeXenonSTABLE

9-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