Summary
With reference to the limits of validity of the static approximation, the use of the methods of conventional and « quasi-elastic » diffraction of slow neutrons for an accurate determination of the structure factor of liquids is discussed. Some criteria are suggested, which should be useful for extracting from a diffraction pattern the structure factor. Experimental tests supporting our remarks are also presented.
Riassunto
Con riferimento ai limiti di validità dell’approssimazione statica, viene discusso l’impiego dei metodi della diffrazione convenzionale e della diffrazione « quasi-elastica » di neutroni lenti per una accurata determinazione del fattore di struttura dei liquidi. Vengono suggeriti alcuni criteri che potrebbero essere utilmente adottati per estrarre il fattore di struttura a partire da un diagramma di diffrazione. Vengono infine presentati alcuni risultati sperimentali che convalidano le considerazioni svolte.
Similar content being viewed by others
References
I. Z. Fisher:Statistical Theory of Liquids (Chicago, 1964).
N. E. Cusack:Rep. Progr. Phys.,26, 361 (1963).
J. M. Ziman:Phil. Mag.,6, 1013 (1961).
C. C. Bradley, T. E. Faber, E. G. Wilson andJ. M. Ziman:Phil. Mag.,7, 865 (1962).
L. J. Sundström:Phil. Mag.,11, 657 (1965).
P. Ascarelli:Phys. Rev.,143, 36 (1966).
L. Van Hove:Phys. Rev.,95, 1374 (1954).
G. Placzek:Phys. Rev.,86, 377 (1952).
G. Vineyard:Phys. Rev.,110, 999 (1958).
P. G. De Gennes:Physica,25, 825 (1959).
V. L. Sailor, H. L. Foote Jr.,H. H. Landon andR. E. Wood:Rev. Sci. Instr.,27, 26 (1956).
G. Caglioti:Acta Cryst.,17, 1202 (1964).
J. E. Enderby, T. Gaskell andN. H. March:Proc. Phys. Soc.,85, 217 (1965).
G. Caglioti andF. P. Ricci:Nuovo Cimento,24, 103 (1962).
G. Caglioti andP. Ascarelli:Proceedings of the Chalk River Symposium on Inelastic Scattering of Neutrons in Solids and Liquids (Vienna, 1963), p. 259.
P. Ascarelli, G. Caglioti andG. Rizzi: to be published.
Author information
Authors and Affiliations
Additional information
Present address: Pitman-Dunu Research Laboratories, Frankford Arsenal, Philadelphia, Penna. 19137.
Preliminary results of this paper were communicated at theLI Congresso Nazionale della S.I.F., Bologna (5–10 November 1965).
Rights and permissions
About this article
Cite this article
Ascarelli, P., Caglioti, G. Accurate measurements of structure factors of liquids by slow-neutron spectrometry. Nuovo Cimento B (1965-1970) 43, 375–388 (1966). https://doi.org/10.1007/BF02710861
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02710861