Periodic Table/Actinium/²⁰⁵Ac

206Ac →

²⁰⁵Ac

Actinium-205

Radioactive· Half-life: 80.0 ms

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

116

Mass Number (A)

205

Atomic Mass

205.015144AMU

Spin / Parity

9/2-

Binding E/A

7.441keV

Natural Abundance

Trace / None

Half-life

80.0 ms

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

α

100.0%

β⁺

Decay Chain

²⁰⁵AcActinium80.0 ms

α100.0%

β⁺²⁰⁵Ra

²⁰¹FrFrancium62.8 ms

α100.0%

β⁺²⁰¹Rn

¹⁹⁷AtAstatine388 ms

α96.1%

β⁺¹⁹⁷Po3.90%

¹⁹³BiBismuth1.06 min

β⁺96.5%

α¹⁸⁹Tl3.50%

β⁺

¹⁹³TlThallium21.6 min

β⁺100.0%

¹⁹³HgMercury3.80 h

β⁺100.0%

¹⁹³AuGold17.6 h

β⁺100.0%

α¹⁸⁹Ir

¹⁹³PtPlatinum50.0 y

EC100.0%

¹⁹³IrIridiumSTABLE

10-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