Periodic Table/Hafnium/¹⁵⁵Hf

← 154Hf156Hf →

¹⁵⁵Hf

Hafnium-155

Radioactive· Half-life: 843 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

72

Neutrons (N)

83

Mass Number (A)

155

Atomic Mass

154.963167AMU

Spin / Parity

7/2-

Binding E/A

7.692keV

Natural Abundance

Trace / None

Half-life

843 ms

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

β⁺

100.0%

α

Decay Chain

¹⁵⁵HfHafnium843 ms

β⁺100.0%

α¹⁵¹Yb

¹⁵⁵LuLutetium68.0 ms

α90.0%

β⁺¹⁵⁵Yb10.0%

¹⁵¹TmThulium4.17 s

β⁺100.0%

¹⁵¹ErErbium23.5 s

β⁺100.0%

¹⁵¹HoHolmium35.2 s

β⁺88.0%

α¹⁴⁷Tb22.0%

¹⁵¹DyDysprosium17.9 min

β⁺94.4%

α¹⁴⁷Gd5.60%

¹⁵¹TbTerbium17.6 h

β⁺100.0%

α¹⁴⁷Eu0.01%

¹⁵¹GdGadolinium124 d

EC100.0%

α¹⁴⁷Sm1.10%

¹⁵¹EuEuropium4600000000 Gy

α100.0%

¹⁴⁷PmPromethium2.62 y

β⁻100.0%

¹⁴⁷SmSamarium107 Gy

α100.0%

¹⁴³NdNeodymiumSTABLE

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

Other Isotopes of Hafnium

153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190

← Back to HafniumData: IAEA NDS · ENSDF