Rutherfordium-267

Properties and data of the isotope ²⁶⁷Rf.

Content

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: list of Rutherfordium isotopes.

General data

Name of the isotope:Rutherfordium-267; Rf-267Symbol:²⁶⁷Rf or 267104RfMass number A:267 (= number of nucleons)Atomic number Z:104 (= number of protons)Neutrons N:163Isotopic mass:267.12179(62) u (atomic weight of Rutherfordium-267)Nuclide mass:267.0647466 u (calculated nuclear mass without electrons)Mass excess:113.44665 MeVMass defect:2.1043946360001 u (per nucleus)Nuclear binding energy:1960.23097707 MeV (per nucleus)
7.34168905 MeV (average binding energy per nucleon)Separation energy:S_N = 4.70(74) MeV (first neutron)
S_P = 5.47(82) MeV (first proton)Half-life:2.5 hDecay constant λ:7.701635339554 × 10^-5 s^-1Specific activity α:1.737091118601 × 10⁺¹⁷ Bq g^-1
4694840.8610857 Ci g^-1Spin and parity:
(nuclear angular momentum)13/2-Year of discovery:2004

Radioactive Decay

Half-life T_½ = 2.5 h (hours) respectively 9 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
SF	div.	~ 100 %

Parent Nuclides

Direct parent isotope is: ²⁷¹Sg.

Occurrence

Comparison of the natural Rutherfordium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Rutherfordium Isotopic mixture	267.12179 u	100 %
Isotope ²⁶⁷Rf	267.12179(62) u	100 %	2.5 h	13/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 163) and isobaric (same nucleon number A = 267) with Rutherfordium-267. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 163	Isobar A = 267
103	²⁶⁶Lr
104	²⁶⁷Rf	²⁶⁷Rf
105	²⁶⁸Db	²⁶⁷Db
106	²⁶⁹Sg	²⁶⁷Sg
107	²⁷⁰Bh	²⁶⁷Bh
108	²⁷¹Hs	²⁶⁷Hs
109	²⁷²Mt	²⁶⁷Mt
110	²⁷³Ds	²⁶⁷Ds
111	²⁷⁴Rg