Periodic Table/Terbium/¹³⁹Tb

← 138Tb140Tb →

¹³⁹Tb

Terbium-139

Radioactive· Half-life: 1.60 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

65

Neutrons (N)

74

Mass Number (A)

139

Atomic Mass

138.948330AMU

Spin / Parity

5/2-

Binding E/A

7.813keV

Natural Abundance

Trace / None

Half-life

1.60 s

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

β⁺

100.0%

β⁺p

Decay Chain

¹³⁹TbTerbium1.60 s

β⁺100.0%

β⁺p¹³⁸Eu

¹³⁹GdGadolinium5.70 s

β⁺100.0%

β⁺p¹³⁸Sm

¹³⁹EuEuropium17.9 s

β⁺100.0%

¹³⁹SmSamarium2.57 min

β⁺100.0%

¹³⁹PmPromethium4.15 min

β⁺100.0%

¹³⁹NdNeodymium29.7 min

β⁺100.0%

¹³⁹PrPraseodymium4.41 h

β⁺100.0%

¹³⁹CeCerium138 d

EC100.0%

¹³⁹LaLanthanumSTABLE

9-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