dc.contributor.author |
Fatkullin N. |
|
dc.contributor.author |
Yatsenko G. |
|
dc.contributor.author |
Kimmich R. |
|
dc.contributor.author |
Fischer E. |
|
dc.date.accessioned |
2018-09-17T21:11:57Z |
|
dc.date.available |
2018-09-17T21:11:57Z |
|
dc.date.issued |
1998 |
|
dc.identifier.issn |
1063-7761 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/134660 |
|
dc.description.abstract |
A general theory of spin diffusion in condensed media is constructed by the method of Zwanzig-Mori projection operators using the superpositional approximation to decouple the many-particle correlation functions. The spin diffusion coefficient is expressed in the form Dsp =Dtf+Df, where Dtr. is the contribution associated with translational displacements of the molecules and Df is the contribution caused by intermolecular flip-flop processes. The expression for Dtr differs from the well-known Kubo-Green formula for the self-diffusion coefficient Dsd in that the integrand contains an additional factor Pf(t), which is the probability of the molecular spins not participating in intermolecular flip-flop transitions over the time t. A microscopic expression is obtained for Df in the form of a time integral of the intermolecular dipole-dipole dynamic correlation functions. For liquid-phase polymer system with fairly high molecular mass the condition Dsp≫Dsd is satisfied. © 1998 American Institute of Physics. |
|
dc.relation.ispartofseries |
Journal of Experimental and Theoretical Physics |
|
dc.title |
Theory of spin diffusion in liquid-phase polymer systems |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
2 |
|
dc.relation.ispartofseries-volume |
87 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
294 |
|
dc.source.id |
SCOPUS10637761-1998-87-2-SID22444455217 |
|