Iron-64

Properties and data of the isotope ⁶⁴Fe.

Contents

General data

Name of the isotope:Iron-64; Fe-64Symbol:⁶⁴Fe or 6426FeMass number A:64 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:38Isotopic mass:63.940988(5) u (atomic weight of Iron-64)Nuclide mass:63.9267253 u (calculated nuclear mass without electrons)Mass excess:-54.96932 MeVMass defect:0.59172964 u (per nucleus)Nuclear binding energy:551.19260928 MeV (per nucleus)
8.61238452 MeV (average binding energy per nucleon)Separation energy:S_N = 7.405(7) MeV (first neutron)
S_P = 15.371(6) MeV (first proton)Half-life:2.0(2) sDecay constant λ:0.34657359027997 s^-1Specific activity α:3.312880919047 × 10⁺²¹ Bq g^-1
89537322136.422 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1980

Radioactive Decay

Half-life T_½ = 2.0(2) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁴Co	100 %	4.823(21) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁴Mn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 38) and isobaric (same nucleon number A = 64) with Iron-64. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 38	Isobar A = 64
20	⁵⁸Ca
21	⁵⁹Sc
22	⁶⁰Ti
23	⁶¹V	⁶⁴V
24	⁶²Cr	⁶⁴Cr
25	⁶³Mn	⁶⁴Mn
26	⁶⁴Fe	⁶⁴Fe
27	⁶⁵Co	⁶⁴Co
28	⁶⁶Ni	⁶⁴Ni
29	⁶⁷Cu	⁶⁴Cu
30	⁶⁸Zn	⁶⁴Zn
31	⁶⁹Ga	⁶⁴Ga
32	⁷⁰Ge	⁶⁴Ge
33	⁷¹As	⁶⁴As
34	⁷²Se	⁶⁴Se
35	⁷³Br
36	⁷⁴Kr
37	⁷⁵Rb
38	⁷⁶Sr
39	⁷⁷Y
40	⁷⁸Zr