Iron-45

Properties and data of the isotope ⁴⁵Fe.

Contents

General data

Name of the isotope:Iron-45; Fe-45Symbol:⁴⁵Fe or 4526FeMass number A:45 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:19Isotopic mass:45.01477(43) u (atomic weight of Iron-45)Nuclide mass:45.0005073 u (calculated nuclear mass without electrons)Mass excess:13.75817 MeVMass defect:0.353314236 u (per nucleus)Nuclear binding energy:329.11009095 MeV (per nucleus)
7.31355758 MeV (average binding energy per nucleon)Separation energy:
S_P = 0.56(64) MeV (first proton)Half-life:1.89 msDecay constant λ:366.74453997881 s^-1Specific activity α:4.907971731922 × 10⁺²⁴ Bq g^-1
1.326478846465 × 10⁺¹⁴ Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2+)Mirror nucleus:Potassium-45Year of discovery:1996

Radioactive Decay

Half-life T_½ = 1.89 ms respectively 1.89 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁴⁵Mn
p	⁴⁴Mn
2p	⁴³Cr

Parent Nuclides

Direct parent isotope is: ⁴⁶Co.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 19) and isobaric (same nucleon number A = 45) with Iron-45. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 19	Isobar A = 45
8	²⁷O
9	²⁸F
10	²⁹Ne
11	³⁰Na
12	³¹Mg
13	³²Al
14	³³Si
15	³⁴P	⁴⁵P
16	³⁵S	⁴⁵S
17	³⁶Cl	⁴⁵Cl
18	³⁷Ar	⁴⁵Ar
19	³⁸K	⁴⁵K
20	³⁹Ca	⁴⁵Ca
21	⁴⁰Sc	⁴⁵Sc
22	⁴¹Ti	⁴⁵Ti
23	⁴²V	⁴⁵V
24	⁴³Cr	⁴⁵Cr
25	⁴⁴Mn	⁴⁵Mn
26	⁴⁵Fe	⁴⁵Fe
27	⁴⁶Co