Periodic Table/Terbium/¹⁴⁰Tb

← 139Tb141Tb →

¹⁴⁰Tb

Terbium-140

Radioactive· Half-life: 2.29 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

65

Neutrons (N)

75

Mass Number (A)

140

Atomic Mass

139.945805AMU

Spin / Parity

7+

Binding E/A

7.831keV

Natural Abundance

Trace / None

Half-life

2.29 s

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

β⁺

100.0%

EC

3.0%

β⁺p

0.3%

Decay Chain

¹⁴⁰TbTerbium2.29 s

β⁺100.0%

EC¹⁴⁰Gd3.00%

β⁺p¹³⁹Eu0.26%

¹⁴⁰GdGadolinium15.8 s

β⁺100.0%

e+¹⁴⁰Eu67.0%

EC¹⁴⁰Eu33.0%

¹⁴⁰EuEuropium1.51 s

β⁺100.0%

e+¹⁴⁰Sm95.1%

EC¹⁴⁰Sm4.90%

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

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

Other Isotopes of Terbium

135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174

← Back to TerbiumData: IAEA NDS · ENSDF