Self-diffusion in liquid potassium
A G Novikov; M N Ivanovskii; V V Savostin; A L Shimkevich; O V Sobolev; M V Zaezjev; A G Novikov; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia; M N Ivanovskii; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia; V V Savostin; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia; A L Shimkevich; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia; O V Sobolev; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia; M V Zaezjev; State Scientific Centre - Institute of Physics and Power Engineering, 249020, Obninsk, Russia
Журнал:
Journal of Physics: Condensed Matter
Дата:
1996-05-13
Аннотация:
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 550 K for wavevector transfers in the range of . The full width at half maximum of this line as a function of has been analysed 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.
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