Rutherfordium-266

Properties and data of the isotope ²⁶⁶Rf.

Content

See also: list of Rutherfordium isotopes.

General data

Name of the isotope:Rutherfordium-266; Rf-266Symbol:²⁶⁶Rf or 266104RfMass number A:266 (= number of nucleons)Atomic number Z:104 (= number of protons)Neutrons N:162Isotopic mass:266.11817(50) u (atomic weight of Rutherfordium-266)Nuclide mass:266.0611266 u (calculated nuclear mass without electrons)Mass excess:110.07465 MeVMass defect:2.09934972 u (per nucleus)Nuclear binding energy:1955.53166808 MeV (per nucleus)
7.35162281 MeV (average binding energy per nucleon)Half-life:23 sDecay constant λ:0.030136833937389 s^-1Specific activity α:6.822866881333 × 10⁺¹⁹ Bq g^-1
1844018076.0362 Ci g^-1Spin and parity:
(nuclear angular momentum)0+

Radioactive Decay

Half-life T_½ = 23 s respectively 2.3 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
SF	^div.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 162) and isobaric (same nucleon number A = 266) with Rutherfordium-266. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 162	Isobar A = 266
103	²⁶⁵Lr	²⁶⁶Lr
104	²⁶⁶Rf	²⁶⁶Rf
105	²⁶⁷Db	²⁶⁶Db
106	²⁶⁸Sg	²⁶⁶Sg
107	²⁶⁹Bh	²⁶⁶Bh
108	²⁷⁰Hs	²⁶⁶Hs
109	²⁷¹Mt	²⁶⁶Mt
110	²⁷²Ds
111	²⁷³Rg