Iron-48

Properties and data of the isotope ⁴⁸Fe.

Content

General data

Name of the isotope:Iron-48; Fe-48Symbol:⁴⁸Fe or 4826FeMass number A:48 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:22Isotopic mass:47.98068(43) u (atomic weight of Iron-48)Nuclide mass:47.9664173 u (calculated nuclear mass without electrons)Mass excess:-17.99646 MeVMass defect:0.413398984 u (per nucleus)Nuclear binding energy:385.0786732 MeV (per nucleus)
8.02247236 MeV (average binding energy per nucleon)Separation energy:S_N = 19.2(64) MeV (first neutron)
S_P = 2.72(40) MeV (first proton)Half-life:44(7) msDecay constant λ:15.753345012726 s^-1Specific activity α:2.018486440038 × 10⁺²³ Bq g^-1
5455368756861.4 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Mirror nucleus:Titanium-48Year of discovery:1987

Radioactive Decay

Half-life T_½ = 44(7) ms respectively 4.4 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁴⁸Mn	96.4 %	11.3(4) MeV
EE, p	⁴⁷Cr	3.6 %

Parent Nuclides

Direct parent isotope is: ⁴⁹Co.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 48) with Iron-48. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 22	Isobar A = 48
9	³¹F
10	³²Ne
11	³³Na
12	³⁴Mg
13	³⁵Al
14	³⁶Si
15	³⁷P
16	³⁸S	⁴⁸S
17	³⁹Cl	⁴⁸Cl
18	⁴⁰Ar	⁴⁸Ar
19	⁴¹K	⁴⁸K
20	⁴²Ca	⁴⁸Ca
21	⁴³Sc	⁴⁸Sc
22	⁴⁴Ti	⁴⁸Ti
23	⁴⁵V	⁴⁸V
24	⁴⁶Cr	⁴⁸Cr
25	⁴⁷Mn	⁴⁸Mn
26	⁴⁸Fe	⁴⁸Fe
27	⁴⁹Co	⁴⁸Co
28	⁵⁰Ni	⁴⁸Ni