Periodic Table/Actinium/²³⁷Ac

← 236Ac

²³⁷Ac

Actinium-237

Radioactive

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

89

Neutrons (N)

148

Mass Number (A)

237

Atomic Mass

237.057993AMU

Spin / Parity

1/2+

Binding E/A

7.358keV

Natural Abundance

Trace / None

Half-life

Unknown

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

β⁻

Decay Chain

²³⁷AcActinium?

β⁻

²³⁷ThThorium4.80 min

β⁻100.0%

²³⁷PaProtactinium8.70 min

β⁻100.0%

²³⁷UUranium6.75 d

β⁻100.0%

²³⁷NpNeptunium2.14 My

α100.0%

30Mg²⁰⁷Tl4.00%

²³³PaProtactinium27.0 d

β⁻100.0%

²³³UUranium159 ky

α100.0%

24Ne²⁰⁹Pb7.20%

28Mg²⁰⁵Hg1.30%

²²⁹ThThorium7.92 ky

α100.0%

²²⁵RaRadium14.8 d

β⁻100.0%

²²⁵AcActinium9.92 d

α100.0%

¹⁴C²¹¹Bi5.30%

²²¹FrFrancium4.80 min

α100.0%

¹⁴C²⁰⁷Tl8.80%

β⁻²²¹Ra0.00%

²¹⁷AtAstatine32.6 ms

α100.0%

β⁻²¹⁷Rn0.01%

²¹³BiBismuth45.6 min

β⁻97.9%

α²⁰⁹Tl2.09%

²¹³PoPolonium3.71 μs

α100.0%

²⁰⁹PbLead3.23 h

β⁻100.0%

²⁰⁹BiBismuth20100000000 Gy

α100.0%

²⁰⁵TlThalliumSTABLE

17-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