Periodic Table/Thorium/²²⁶Th

← 225Th227Th →

²²⁶Th

Thorium-226

Radioactive· Half-life: 30.7 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

90

Neutrons (N)

136

Mass Number (A)

226

Atomic Mass

226.024904AMU

Spin / Parity

0+

Binding E/A

7.454keV

Natural Abundance

Trace / None

Half-life

30.7 min

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

α

100.0%

18O

3.2%

Decay Chain

²²⁶ThThorium30.7 min

α100.0%

18O²⁰⁸Pb3.20%

²²²RaRadium33.6 s

α100.0%

¹⁴C²⁰⁸Pb3.00%

²¹⁸RnRadon33.8 ms

α100.0%

²¹⁴PoPolonium163 μs

α100.0%

²¹⁰PbLead22.2 y

β⁻100.0%

α²⁰⁶Hg1.90%

²¹⁰BiBismuth5.01 d

β⁻100.0%

α²⁰⁶Tl13.2%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

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

Other Isotopes of Thorium

208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239

← Back to ThoriumData: IAEA NDS · ENSDF