Iron-47

Properties and data of the isotope ⁴⁷Fe.

Contents

General data

Name of the isotope:Iron-47; Fe-47Symbol:⁴⁷Fe or 4726FeMass number A:47 (= number of nucleons)Atomic number Z:26 (= number of protons)Neutrons N:21Isotopic mass:46.99262(54) u (atomic weight of Iron-47)Nuclide mass:46.9783573 u (calculated nuclear mass without electrons)Mass excess:-6.87443 MeVMass defect:0.392794068 u (per nucleus)Nuclear binding energy:365.88531758 MeV (per nucleus)
7.78479399 MeV (average binding energy per nucleon)Separation energy:S_N = 15.85(71) MeV (first neutron)
S_P = 1.59(64) MeV (first proton)Half-life:21.8(7) msDecay constant λ:31.79574222752 s^-1Specific activity α:4.162574748703 × 10⁺²³ Bq g^-1
11250202023523 Ci g^-1Spin and parity:
(nuclear angular momentum)(7/2-)Mirror nucleus:Scandium-47Year of discovery:1992

Radioactive Decay

Half-life T_½ = 21.8(7) ms respectively 2.18 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁴⁷Mn
β⁺, p	⁴⁶Cr
β⁺, 2p	⁴⁵Cr

Parent Nuclides

Direct parent isotope is: ⁴⁸Co.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 21) and isobaric (same nucleon number A = 47) with Iron-47. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 21	Isobar A = 47
9	³⁰F
10	³¹Ne
11	³²Na
12	³³Mg
13	³⁴Al
14	³⁵Si
15	³⁶P
16	³⁷S	⁴⁷S
17	³⁸Cl	⁴⁷Cl
18	³⁹Ar	⁴⁷Ar
19	⁴⁰K	⁴⁷K
20	⁴¹Ca	⁴⁷Ca
21	⁴²Sc	⁴⁷Sc
22	⁴³Ti	⁴⁷Ti
23	⁴⁴V	⁴⁷V
24	⁴⁵Cr	⁴⁷Cr
25	⁴⁶Mn	⁴⁷Mn
26	⁴⁷Fe	⁴⁷Fe
27	⁴⁸Co	⁴⁷Co
28	⁴⁹Ni