Using recoilless Mossbauer spectroscopy methods, we investigate the atomic absorption spectra of the 14.4keV transition in Fe compounds. The natural linewidth of this transition is determined to the correct order of magnitude with χν = .75. Hyperfine energy shifts in iron oxide and iron sulfate are investigated and measured. The ratio of ground and excited state magnetic moment in Fe is found t...

High-field susceptibility XHF in Fe and Ni (at 4.2, 77, and 300 K) and high-field Mossbauer studies in Fe at 4.2°K are reported and related to the band structure of Fe and Ni and to band models of ferromag­ netism. The Mossbauer effect was employed to measure the change in the hyperfine field H n at the 57Fe nucleus with application of an external field. Assuming H n to be proportional to the b...

• UV and visible emission originated from Cerium doping in CaSnF 6 . Impact of synthesis on photochromism effect stannate compound. Modification doped linked to thermal history. Considering the interest develop new photochromic compounds, Ce doped-CaSnF have been selected thoroughly characterized. After optimization route, structural morphological properties, are described. The origin optical p...

-The application of Mossbauer spectra to the study of the state of iron atoms in biological ~nolecules is described. The chetiiical shift when suitably calibrated enables the oxidation state of the iron to be determined. The magnetic hyperfine coupling is even more sensitive to the state of the iron and for iron-sulphur proteins provides direct evidence that groups of iron atoms are strongly co...

— A new neptunium fluorozirconate glass (NpBasZrnF*) has been prepared and its Mossbauer spectrum was measured at 4.2 K and 77 K. Two resonance lines were observed. One is assigned to the Np ions occupying the normal Np sites in the compound. The other is thought to arise from Np which has replaced some of the Ba ions. The isomer shift of those ions suggests a configuration near 5f 6d . The Np ...

Copyright 1996-2012 Researchpub.org. All rights Reserved. 18 Abstract— The effect of strontium dopping on magnetic properties of neodymium orthoferrimanganites have been investigated using neutron diffraction and MÖssbauer spectroscopy. All samples prepared using solid state reaction from pure oxides. The XRD reflections exhibited single phase structure of both samples. The neutron diffraction...

Addition of H(+) to a synthetic (mu-1,2-peroxo)diiron(III) model complex results in protonation of a carboxylate rather than the peroxo ligand. This conclusion is based on spectroscopic evidence from UV-vis, (57)Fe Mossbauer, resonance Raman, infrared, and (1)H/(19)F NMR studies. These results suggest a similar role for protons in the dioxygen activation reactions in soluble methane monooxygena...

By means of the Mossbauer Effect a systematic dose and dose rate study has been performed on xenon implanted in iron. The substitutional fraction of the xenon nuclei decreases when the implantation dose is increased from 5 X 1011 atoms/cm2 to 1015 atoms/cmz. Two samples were implanted both to a dose of 5 X 1013 atoms/cm* but with a dose rate ratio of 75. The sample with the highest dose rate sh...