Periodic Table/Actinium/²⁰⁸Ac

← 207Ac209Ac →

²⁰⁸Ac

Actinium-208

Radioactive· Half-life: 97.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

119

Mass Number (A)

208

Atomic Mass

208.011552AMU

Spin / Parity

3+

Binding E/A

7.466keV

Natural Abundance

Trace / None

Half-life

97.0 ms

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

α

100.0%

β⁺

Decay Chain

²⁰⁸AcActinium97.0 ms

α100.0%

β⁺²⁰⁸Ra

²⁰⁴FrFrancium1.75 s

α96.0%

β⁺²⁰⁴Rn

²⁰⁰AtAstatine43.2 s

α52.0%

β⁺²⁰⁰Po48.0%

¹⁹⁶BiBismuth5.13 min

β⁺100.0%

α¹⁹²Tl0.00%

¹⁹⁶PbLead37.0 min

β⁺100.0%

α¹⁹²Hg3.00%

¹⁹⁶TlThallium1.84 h

β⁺100.0%

¹⁹⁶HgMercurySTABLE

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

Other Isotopes of Actinium

205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237

← Back to ActiniumData: IAEA NDS · ENSDF