Mössbauer Line Positions and Hyperfine Interactions in α Iron

Abstract

The 57Fe Mössbauer spectrum of NBS standard reference material 1541 α-iron foil has been determined at 298±2 and 4.2±0.1°K, using a palladium source at 298±2°K. Line positions at 298 and 4.3°K were determined for the calibration of Mössbauer spectrometers. The magnetic splitting, in mm/sec, of the 57Fe ground state and first excited state are g0=(3.9098±0.0008), g1=(2.2342±0.0008) at 298°K and g0=(4.0117±0.0010), g1=(2.2931±0.0010) at 4.3°K. The center shift is − (0.1748±0.0008) mm/sec at 298°K and − (0.0556±0.0012) mm/sec at 4.3°K; the temperature shift is − (0.1192±0.0014) mm/sec. The hyperfine magnetic field is − (330.4±0.3) kOe at 298°K and − (339.0±0.3) kOe at 4.3°K. The 57Fe magnetic moment ratio is μ1/μ0=−1.7145±0.0005. The magnetic moment of the first excited state is μ1=−0.1547±0.0001 nm. The hyperfine magnetic field ratio is H(298°K)/H(4.3°K)=0.9746±0.0001. The electric quadrupole effect in terms of ε, the shift of the ±32 levels, is 4ε=+0.0023±0.0015 mm/sec at 298°K and 4ε=+0.0088±0.0025 mm/sec at 4.3°K. At 298°K, the quadrupole coupling is never between +0.0023±0.0015 mm/sec and −0.0046±0.0030 mm/sec. At 4.3°K, it is never between +0.0088±0.0025 mm/sec and −0.0176±0.0050 mm/sec. The 57Fe Mössbauer transition in palladium is more energetic than in sodium nitroprusside by 0.4361±0.0009 mm/sec.

Mössbauer and ELNES spectroscopy of (Mg,Fe)(Si,Al)O3 perovskite: a highly oxidised component of the lower mantle

“…The ®rst sextet (labelled A) is assigned to a-Fe, where hyper®ne parameters correspond to those reported in the literature (e.g. Violet and Pipkorn 1971). Hyper®ne parameters for the second sextet (labelled B) are given in Tables 2 and 3.…”

Magnetic moments around theZ=40 shell closure:Ym91,Berkes1, M2, Hlimi3 et al. 1991Phys. Rev. C12030View full textAdd to dashboardCite

“…This room temperature value has been extrapolated to low temperature using the precise ratio for Bhf(FeFe ) from the Mossbauer effect [13] Bhf (300 K)/Bi, f (4 K) =0.9746 (1). As the temperature dependence of Bhf(ZrFe) may be somewhat different from that of iron, we increase the error on the correction factor 0.975 (10) and use for the evaluation of the magnetic moment BI, (Zr, Fe, 0 K)= -28.…”

Nonlinear optical frequency conversion in a resonator with random inhomogeneities

“…The spectrometer was calibrated using the spectrum of a natural iron foil absorber at room temperature and the data of Violet and Pipkorn (1971). Zero velocity was taken to be the centroid of the iron foil spectrum.…”