Iron-63

Properties and data of the isotope ⁶³Fe.

Contents

General data

Name of the isotope:Iron-63; Fe-63Symbol:⁶³Fe or 6326FeMass number A:63 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:37Isotopic mass:62.940273(5) u (atomic weight of Iron-63)Nuclide mass:62.9260103 u (calculated nuclear mass without electrons)Mass excess:-55.63534 MeVMass defect:0.583779724 u (per nucleus)Nuclear binding energy:543.78731023 MeV (per nucleus)
8.63154461 MeV (average binding energy per nucleon)Separation energy:S_N = 4.829(5) MeV (first neutron)
S_P = 14.401(8) MeV (first proton)Half-life:6.1(6) sDecay constant λ:0.1136306853377 s^-1Specific activity α:1.103709666314 × 10⁺²¹ Bq g^-1
29829990981.462 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1980

Radioactive Decay

Half-life T_½ = 6.1(6) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁶³Co	100 %	6.216(19) MeV

Parent Nuclides

Direct parent isotope is: ⁶³Mn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 63) with Iron-63. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 37	Isobar A = 63
19	⁵⁶K
20	⁵⁷Ca
21	⁵⁸Sc
22	⁵⁹Ti	⁶³Ti
23	⁶⁰V	⁶³V
24	⁶¹Cr	⁶³Cr
25	⁶²Mn	⁶³Mn
26	⁶³Fe	⁶³Fe
27	⁶⁴Co	⁶³Co
28	⁶⁵Ni	⁶³Ni
29	⁶⁶Cu	⁶³Cu
30	⁶⁷Zn	⁶³Zn
31	⁶⁸Ga	⁶³Ga
32	⁶⁹Ge	⁶³Ge
33	⁷⁰As	⁶³As
34	⁷¹Se	⁶³Se
35	⁷²Br
36	⁷³Kr
37	⁷⁴Rb
38	⁷⁵Sr
39	⁷⁶Y
40	⁷⁷Zr