Periodic Table/Americium/²³⁵Am

← 234Am236Am →

²³⁵Am

Americium-235

Radioactive· Half-life: 10.3 min

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

95

Neutrons (N)

140

Mass Number (A)

235

Atomic Mass

235.047906AMU

Spin / Parity

5/2-

Binding E/A

7.359keV

Natural Abundance

Trace / None

Half-life

10.3 min

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

β⁺

99.6%

α

0.4%

Decay Chain

²³⁵AmAmericium10.3 min

β⁺99.6%

α²³¹Np0.40%

²³⁵PuPlutonium25.3 min

β⁺100.0%

α²³¹U0.00%

²³⁵NpNeptunium1.08 y

EC100.0%

α²³¹Pa0.00%

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 Americium

223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249

← Back to AmericiumData: IAEA NDS · ENSDF