Iron-67m

Properties and data of the isotope ^67mFe.

Contents

General data

Name of the isotope:Iron-67m; Fe-67mSymbol:^67mFe or 67m26FeMass 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-67m)
Excitation energy: 387 keVNuclide 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)Half-life:75(21) μsDecay constant λ:9241.9624074659 s^-1Specific activity α:8.432787793939 × 10⁺²⁵ Bq g^-1
2.279131836199 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)(1/2-)

Radioactive Decay

Half-life T_½ = 75(21) μs respectively 7.5 × 10^-5 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	⁶⁷Fe	100 %

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
⁶⁷Fe		0.6 s	(5/2+)

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-67m. 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