Mössbauer spectroscopy, superparamagnetism and ferrofluids
نویسندگان
چکیده
منابع مشابه
182tungsten Mössbauer spectroscopy of heteropolytungstates.
The tungsten-182 Mössbauer spectra of a series of Keggin structure heteropolytungstates, [EW12O40]n- are reported. There is a very considerable variation in quadrupole coupling at the tungsten nucleus indicating considerable asymmetry in the electron distribution for the more electronegative elements E. The quadrupole coupling correlates well with the structural data, in particular with the dis...
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We used a novel experimental setup to conduct the first synchrotron-based (61)Ni Mössbauer spectroscopy measurements in the energy domain on Ni coordination complexes and metalloproteins. A representative set of samples was chosen to demonstrate the potential of this approach. (61)NiCr2O4 was examined as a case with strong Zeeman splittings. Simulations of the spectra yielded an internal magnet...
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A new method of performing Mössbauer spectroscopy with synchrotron radiation is demonstrated that involves using a high-speed periodic shutter near the focal spot of a microfocused X-ray beam. This fast microshuttering technique operates without a high-resolution monochromator and has the potential to produce much higher signal rates. It also offers orders of magnitude more suppression of unwan...
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which is a mixture of Fht:Mag:Mht in a 40:40:20 ratio. The red line is the fit envelope, the sum of all modeled peaks. Figure 1. VNIR reflectance spectra of FeOx mixtures. MÖSSBAUER AND REFLECTANCE SPECTROSCOPY OF IRON OXIDE MIXTURES. M. D. Dyar, E. Murad, E. C. Sklute, J. L. Bishop, and A. C. Muirhead, Dept. of Astronomy, Mount Holyoke College, South Hadley, MA, 01075, ([email protected]), 2...
متن کاملMössbauer spectroscopy of metalloproteins and the use of Fourier transforms.
A method for obtaining accurate, quantitative 57Fe Mössbauer spectra from biological samples is illustrated stepwise in a data reduction procedure. Exact criteria are presented for deciding when it is necessary to account for the effects of the Beer-Lambert law in the Mössbauer spectra from biological samples. This procedure makes extensive use of the fast Fourier transform and other computer t...
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ژورنال
عنوان ژورنال: Brazilian Journal of Physics
سال: 2001
ISSN: 0103-9733
DOI: 10.1590/s0103-97332001000300011