Iron-73

Properties and data of the isotope ⁷³Fe.

Contents

See also: List of individual Iron isotopes (and general data sources).

General data

Name of the isotope:Iron-73; Fe-73Symbol:⁷³Fe or 7326FeMass number A:73 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:47Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.8076923076923 (= neutron-proton ratio)Neutron excess (N-Z):21Isotopic mass:72.97542(54) u (atomic weight of Iron-73)Nuclide mass:72.9611573 u (calculated nuclear mass without electrons)Mass excess:-22.89612 MeVMass defect:0.63528188400001 u (per nucleus)Nuclear binding energy:591.76126325 MeV (per nucleus)
8.10631867 MeV (average binding energy per nucleon)Separation energy:S_N = 2.54(71) MeV (first neutron)
S_P = 20.29(78) MeV (first proton)Half-life:12.9(16) msDecay constant λ:53.73233957829 s^-1Specific activity α:4.494218301033 × 10⁺²³ Bq g^-1
12146535948739 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 12.9(16) ms respectively 1.29 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	⁷³Co	100 %	14.52(64) MeV
β^-, n	⁷²Co	?	9.23(64) MeV
β^-, 2n	⁷¹Co	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 47) and isobaric (same nucleon number A = 73) with Iron-73. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 47	Isobar A = 73
26	⁷³Fe	⁷³Fe
27	⁷⁴Co	⁷³Co
28	⁷⁵Ni	⁷³Ni
29	⁷⁶Cu	⁷³Cu
30	⁷⁷Zn	⁷³Zn
31	⁷⁸Ga	⁷³Ga
32	⁷⁹Ge	⁷³Ge
33	⁸⁰As	⁷³As
34	⁸¹Se	⁷³Se
35	⁸²Br	⁷³Br
36	⁸³Kr	⁷³Kr
37	⁸⁴Rb	⁷³Rb
38	⁸⁵Sr	⁷³Sr
39	⁸⁶Y
40	⁸⁷Zr
41	⁸⁸Nb
42	⁸⁹Mo
43	⁹⁰Tc
44	⁹¹Ru
45	⁹²Rh
46	⁹³Pd
47	⁹⁴Ag
48	⁹⁵Cd
49	⁹⁶In