Periodic Table/Actinium/²¹⁵Ac

← 214Ac216Ac →

²¹⁵Ac

Actinium-215

Radioactive· Half-life: 171 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

126

Mass Number (A)

215

Atomic Mass

215.006474AMU

Spin / Parity

9/2-

Binding E/A

7.508keV

Natural Abundance

Trace / None

Half-life

171 ms

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

α

100.0%

β⁺

0.1%

Decay Chain

²¹⁵AcActinium171 ms

α100.0%

β⁺²¹⁵Ra0.09%

²¹¹FrFrancium3.10 min

α87.0%

β⁺²¹¹Rn13.0%

²⁰⁷AtAstatine1.81 h

β⁺90.0%

α²⁰³Bi10.0%

²⁰⁷PoPolonium5.80 h

β⁺100.0%

α²⁰³Pb0.02%

²⁰⁷BiBismuth31.2 y

β⁺100.0%

²⁰⁷PbLeadSTABLE

6-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