Periodic Table/Thulium/¹⁵⁷Tm

← 156Tm158Tm →

¹⁵⁷Tm

Thulium-157

Radioactive· Half-life: 3.63 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

69

Neutrons (N)

88

Mass Number (A)

157

Atomic Mass

156.936973AMU

Spin / Parity

1/2+

Binding E/A

7.877keV

Natural Abundance

Trace / None

Half-life

3.63 min

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

β⁺

100.0%

α

7.5%

Decay Chain

¹⁵⁷TmThulium3.63 min

β⁺100.0%

α¹⁵³Ho7.50%

¹⁵⁷ErErbium18.6 min

β⁺100.0%

¹⁵⁷HoHolmium12.6 min

β⁺100.0%

¹⁵⁷DyDysprosium8.14 h

β⁺100.0%

¹⁵⁷TbTerbium71.0 y

EC100.0%

¹⁵⁷GdGadoliniumSTABLE

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

Other Isotopes of Thulium

144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182

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