Periodic Table/Terbium/¹³⁸Tb

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¹³⁸Tb

Terbium-138

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

65

Neutrons (N)

73

Mass Number (A)

138

Atomic Mass

137.953193AMU

Spin / Parity

2+

Binding E/A

7.778keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁺

β⁺p

p

0.0%

Decay Chain

¹³⁸TbTerbium?

β⁺

β⁺p¹³⁷Eu

p¹³⁷Gd0.00%

¹³⁸GdGadolinium4.70 s

β⁺100.0%

¹³⁸EuEuropium?

β⁺

¹³⁸SmSamarium3.10 min

β⁺100.0%

¹³⁸PmPromethium3.24 min

β⁺100.0%

¹³⁸NdNeodymium5.04 h

β⁺100.0%

¹³⁸PrPraseodymium1.45 min

β⁺100.0%

¹³⁸CeCeriumSTABLE

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