Iron-69

Properties and data of the isotope ⁶⁹Fe.

Contents

General data

Name of the isotope:Iron-69; Fe-69Symbol:⁶⁹Fe or 6926FeMass number A:69 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:43Isotopic mass:68.95810(43) u (atomic weight of Iron-69)Nuclide mass:68.9438373 u (calculated nuclear mass without electrons)Mass excess:-39.0296 MeVMass defect:0.61794222 u (per nucleus)Nuclear binding energy:575.60947028 MeV (per nucleus)
8.34216624 MeV (average binding energy per nucleon)Separation energy:S_N = 3.61(54) MeV (first neutron)
S_P = 17.94(56) MeV (first proton)Half-life:110(5) msDecay constant λ:6.3013380050904 s^-1Specific activity α:5.580521334224 × 10⁺²² Bq g^-1
1508249009249.9 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-~Year of discovery:1992

Radioactive Decay

Half-life T_½ = 110(5) ms respectively 1.10 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶⁹Co	100 %	11.25(42) MeV

Parent Nuclides

Direct parent isotope is: ⁶⁹Mn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 69) with Iron-69. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 43	Isobar A = 69
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn	⁶⁹Mn
26	⁶⁹Fe	⁶⁹Fe
27	⁷⁰Co	⁶⁹Co
28	⁷¹Ni	⁶⁹Ni
29	⁷²Cu	⁶⁹Cu
30	⁷³Zn	⁶⁹Zn
31	⁷⁴Ga	⁶⁹Ga
32	⁷⁵Ge	⁶⁹Ge
33	⁷⁶As	⁶⁹As
34	⁷⁷Se	⁶⁹Se
35	⁷⁸Br	⁶⁹Br
36	⁷⁹Kr	⁶⁹Kr
37	⁸⁰Rb
38	⁸¹Sr
39	⁸²Y
40	⁸³Zr
41	⁸⁴Nb
42	⁸⁵Mo
43	⁸⁶Tc
44	⁸⁷Ru