Periodic Table/Rutherfordium/²⁵⁵Rf

← 254Rf256Rf →

²⁵⁵Rf

Rutherfordium-255

Radioactive· Half-life: 1.63 s

Nuclear Propertiesbinding energy · spin-parity · abundance

Protons (Z)

104

Neutrons (N)

151

Mass Number (A)

255

Atomic Mass

255.101267AMU

Spin / Parity

9/2-

Binding E/A

7.174keV

Natural Abundance

Trace / None

Half-life

1.63 s

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

α

52.8%

SF

47.2%

β⁺

6.0%

Decay Chain

²⁵⁵RfRutherfordium1.63 s

α52.8%

β⁺²⁵⁵Lr6.00%

²⁵¹NoNobelium800 ms

α83.0%

β⁺²⁵¹Md

²⁴⁷FmFermium31.0 s

α64.0%

β⁺²⁴⁷Es

²⁴³CfCalifornium10.8 min

β⁺86.0%

α²³⁹Cm14.0%

²⁴³BkBerkelium4.60 h

β⁺100.0%

α²³⁹Am0.15%

²⁴³CmCurium29.1 y

α100.0%

EC²⁴³Am0.29%

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

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

Other Isotopes of Rutherfordium

253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268

← Back to RutherfordiumData: IAEA NDS · ENSDF