Periodic Table/Fermium/²⁴⁸Fm

← 247Fm249Fm →

²⁴⁸Fm

Fermium-248

Radioactive· Half-life: 34.5 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

100

Neutrons (N)

148

Mass Number (A)

248

Atomic Mass

248.077185AMU

Spin / Parity

0+

Binding E/A

7.260keV

Natural Abundance

Trace / None

Half-life

34.5 s

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

α

100.0%

β⁺

SF

0.1%

Decay Chain

²⁴⁸FmFermium34.5 s

α100.0%

β⁺²⁴⁸Es

²⁴⁴CfCalifornium19.5 min

α75.0%

EC²⁴⁴Bk25.0%

²⁴⁰CmCurium30.4 d

α100.0%

EC²⁴⁰Am

²³⁶PuPlutonium2.86 y

α100.0%

28Mg²⁰⁸Pb2.00%

2β⁺²³⁶U

²³²UUranium68.9 y

α100.0%

24Ne²⁰⁸Pb8.90%

28Mg²⁰⁴Hg5.00%

²²⁸ThThorium1.91 y

α100.0%

20O²⁰⁸Pb1.13%

²²⁴RaRadium3.63 d

α100.0%

¹⁴C²¹⁰Pb4.00%

²²⁰RnRadon55.6 s

α100.0%

2β⁻²²⁰Ra

²¹⁶PoPolonium144 ms

α100.0%

2β⁻²¹⁶Rn

²¹²PbLead10.6 h

β⁻100.0%

²¹²BiBismuth1.01 h

β⁻64.1%

α²⁰⁸Tl35.9%

β⁻α²⁰⁸Pb0.01%

²¹²PoPolonium294 ns

α100.0%

²⁰⁸PbLeadSTABLE

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

Other Isotopes of Fermium

241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260

← Back to FermiumData: IAEA NDS · ENSDF