Periodic Table/Curium/²³⁸Cm

← 237Cm239Cm →

²³⁸Cm

Curium-238

Radioactive· Half-life: 2.20 h

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

96

Neutrons (N)

142

Mass Number (A)

238

Atomic Mass

238.053082AMU

Spin / Parity

0+

Binding E/A

7.342keV

Natural Abundance

Trace / None

Half-life

2.20 h

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

EC

α

3.8%

SF

0.0%

Decay Chain

²³⁸CmCurium2.20 h

α3.84%

EC²³⁸Am

²³⁴PuPlutonium8.80 h

EC94.0%

α²³⁰U6.00%

²³⁴NpNeptunium4.40 d

β⁺100.0%

²³⁴UUranium246 ky

α100.0%

26Ne²⁰⁸Pb9.00%

28Mg²⁰⁶Hg1.40%

²³⁰ThThorium75.4 ky

α100.0%

24Ne²⁰⁶Hg5.80%

²²⁶RaRadium1.60 ky

α100.0%

¹⁴C²¹²Pb2.60%

2β⁻²²⁶Th

²²²RnRadon3.82 d

α100.0%

²¹⁸PoPolonium3.10 min

α100.0%

β⁻²¹⁸At0.02%

²¹⁴PbLead27.1 min

β⁻100.0%

²¹⁴BiBismuth19.9 min

β⁻100.0%

α²¹⁰Tl0.02%

β⁻α²¹⁰Pb0.00%

²¹⁴PoPolonium163 μs

α100.0%

²¹⁰PbLead22.2 y

β⁻100.0%

α²⁰⁶Hg1.90%

²¹⁰BiBismuth5.01 d

β⁻100.0%

α²⁰⁶Tl13.2%

²¹⁰PoPolonium138 d

α100.0%

²⁰⁶PbLeadSTABLE

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