Read e-book online Applications of MöSsbauer Spectroscopy PDF

By Richard L. Cohen (Eds.)

ISBN-10: 0121784029

ISBN-13: 9780121784027

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Extra resources for Applications of MöSsbauer Spectroscopy

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In order to estimate the hyperfine field of surface ions, they obtained a spectrum of y-Fe 2 0 3 particles with the surface ions enriched in 57 Fe. The size of the surface hyperfine field was found to be very close to the bulk value. Therefore, they were able to conclude that the decrease in hyperfine fields with 1 31 Magnetic Microcrystals / g iQ. Cd O CO · : . · - ' / *. ; ·. · / ·· / . : -: \ . λ · · 108K . · . 125K \ : ·. ' 180K 10 0 m < . ' /» Λ Λ τ \ > ,. ' /\ . ■ / · Λ /N / " . ♦ · · ''* .

A. (1975b). In "The Physical Basis for Heteroge­ neous Catalysis" (E. Drauglish and R. I. ), p. 337. Plenum Press, New York. , Dumesic, J. , and Topsóe, H. (1977). Proc. Nat. Acad. Sci. U. S. 74, 806. Bozorth, R. M. (1951). " van Nostrand-Reinhold, Princeton, New Jersey. Brown, W. , Jr. (1959). / . Appi. Phys. Suppl. 30, 130S. Brown, W. , Jr. (1963a). J. Appi. Phys. 34, 1319. Brown, W. , Jr. (1963b). Phys. Rev. 130, 1677. Bukrey, R. , and Kenealy, P. , Beard, G. , and Hooper, H. O. (1974). Phys.

108K . · . 125K \ : ·. ' 180K 10 0 m < . ' /» Λ Λ τ \ > ,. ' /\ . ■ / · Λ /N / " . ♦ · · ''* . · ~ *· * 225 K : 300K * ' ^ ' 350 K -10 - 6 - 2 2 6 10 -10 - 6 - 2 2 6 10 VELOCITY (mm/sec) Fig. 10. Experimental and theoretical Mossbauer spectra of 10-nm particles of F e 3 0 4 at various temperatures. , 1976). 32 Steen Morup, James A. Dumesic, and Henrik Topsoe decreasing particle size is not due to surface effects, but can be explained by collective magnetic excitations.

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Applications of MöSsbauer Spectroscopy by Richard L. Cohen (Eds.)


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