Iron-67

Properties and data of the isotope ⁶⁷Fe.

Contents

General data

Name of the isotope:Iron-67; Fe-67Symbol:⁶⁷Fe or 6726FeMass number A:67 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:41Isotopic mass:66.95104(29) u (atomic weight of Iron-67)Nuclide mass:66.9367773 u (calculated nuclear mass without electrons)Mass excess:-45.60595 MeVMass defect:0.607672388 u (per nucleus)Nuclear binding energy:566.04318339 MeV (per nucleus)
8.44840572 MeV (average binding energy per nucleon)Separation energy:S_N = 3.61(27) MeV (first neutron)
S_P = 16.15(27) MeV (first proton)Half-life:0.6 sDecay constant λ:1.1552453009332 s^-1Specific activity α:1.054098474242 × 10⁺²² Bq g^-1
284891479524.97 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Year of discovery:1985

Radioactive Decay

Half-life T_½ = 0.6 s respectively 6 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁷Co	100 %	9.71(27) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁷Mn.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^67mFe	387 keV	75(21) μs	(1/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 67) with Iron-67. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 41	Isobar A = 67
22	⁶³Ti
23	⁶⁴V	⁶⁷V
24	⁶⁵Cr	⁶⁷Cr
25	⁶⁶Mn	⁶⁷Mn
26	⁶⁷Fe	⁶⁷Fe
27	⁶⁸Co	⁶⁷Co
28	⁶⁹Ni	⁶⁷Ni
29	⁷⁰Cu	⁶⁷Cu
30	⁷¹Zn	⁶⁷Zn
31	⁷²Ga	⁶⁷Ga
32	⁷³Ge	⁶⁷Ge
33	⁷⁴As	⁶⁷As
34	⁷⁵Se	⁶⁷Se
35	⁷⁶Br	⁶⁷Br
36	⁷⁷Kr	⁶⁷Kr
37	⁷⁸Rb
38	⁷⁹Sr
39	⁸⁰Y
40	⁸¹Zr
41	⁸²Nb
42	⁸³Mo
44	⁸⁵Ru