Periodic Table/Curium/²³⁹Cm

← 238Cm240Cm →

²³⁹Cm

Curium-239

Radioactive· Half-life: 2.50 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

96

Neutrons (N)

143

Mass Number (A)

239

Atomic Mass

239.054909AMU

Spin / Parity

7/2-

Binding E/A

7.338keV

Natural Abundance

Trace / None

Half-life

2.50 h

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

β⁺

100.0%

α

6.2%

Decay Chain

²³⁹CmCurium2.50 h

β⁺100.0%

α²³⁵Pu6.20%

²³⁹AmAmericium11.9 h

EC100.0%

α²³⁵Np0.01%

²³⁹PuPlutonium24.1 ky

α100.0%

²³⁵UUranium704 My

α100.0%

20Ne²¹⁵Pb8.00%

25Ne²¹⁰Pb8.00%

28Mg²⁰⁷Hg8.00%

²³¹ThThorium1.06 d

β⁻100.0%

²³¹PaProtactinium32.6 ky

α100.0%

24Ne²⁰⁷Tl13.4%

23F²⁰⁸Pb9.90%

²²⁷AcActinium21.8 y

β⁻98.6%

α²²³Fr1.38%

²²⁷ThThorium18.7 d

α100.0%

²²³RaRadium11.4 d

α100.0%

¹⁴C²⁰⁹Pb8.90%

²¹⁹RnRadon3.96 s

α100.0%

²¹⁵PoPolonium1.78 ms

α100.0%

β⁻²¹⁵At2.30%

²¹¹PbLead36.2 min

β⁻100.0%

²¹¹BiBismuth2.14 min

α100.0%

β⁻²¹¹Po0.28%

²⁰⁷TlThallium4.77 min

β⁻100.0%

²⁰⁷PbLeadSTABLE

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

Other Isotopes of Curium

231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252

← Back to CuriumData: IAEA NDS · ENSDF