57Fe Isotope Properties
Isotopic abundance 2.14(1)%

Ground state properties:
μ = 0.09062(3) nm

Excited state properties:
E = 14.412497(3) keV
ER = 1.95883310(4) 10-3 eV
αIC = 8.20
σ = 2.56 10-18 cm2
μ = -0.1549 nm
Q = 0.16(1) b
T1/2 = 98.3(3) ns
W = 0.194(2) mm/s

E = 136.4785 keV
ER = 1.755939(6) 10-1 eV
αIC = 0.14
σ = 3.45 10-19 cm2
μ = 0.935(10) nm
T1/2 = 8.7(3) ns
W = 0.23(5) mm/s


Source Production:
56Fe(p,γ)
55Mn(α,2n)
57Fe(n,p)
54Cr(α,p)
Unit Conversion:
1 mm/s = 11.6248 MHz
1 mm/s = 4.80766 10-8 eV
1 mm/s = 110.076 MHz
1 mm/s = 4.55243 10-7 eV
Isomer Shift Scale Decay Diagram
Angular Dependence of Transition Intensity
Temperature Dependence of Recoil-Free Fraction in Debye Model
References on the subject:

Mössbauer Effect Data Center – July 2010