Self-diffusion in liquid potassium

The natural line of the incoherent quasi-elastic neutron scattering law of liquid potassium has been obtained from experimental double-differential scattering cross-sections at the temperatures of 340, 440, and 550K for wavevectors transfers in the range of 0.27 < =Q < =1.13A exp -1 . The full...

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Published inJournal of physics. Condensed matter Vol. 8; no. 20; pp. 3525 - 3536
Main Authors Novikov, A G, Ivanovskii, M N, Savostin, V V, Shimkevich, A L, Sobolev, O V, Zaezjev, M V
Format Journal Article
LanguageEnglish
Published IOP Publishing 13.05.1996
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Summary:The natural line of the incoherent quasi-elastic neutron scattering law of liquid potassium has been obtained from experimental double-differential scattering cross-sections at the temperatures of 340, 440, and 550K for wavevectors transfers in the range of 0.27 < =Q < =1.13A exp -1 . The full width at half maximum of this line as a function of Q exp 2 has been analyzed on the basis of several diffusion models. It has been found that the self-diffusion process in liquid potassium has an individual and activationless character and can be approximately described by means of the mode-coupling theory at temperatures noticeably more than the melting point.
Bibliography:ObjectType-Article-2
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ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/8/20/001