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|Type:||Artigo de periódico|
|Title:||On The Relaxation Time Hierarchy In Dissipative Systems: An Example From Semiconductor Physics|
|Abstract:||We consider the question of the contraction of the macroscopic nonequilibrium thermodynamic description of dissipative dynamic systems. As argumented by Bogoliubov, this process is associated to the determination of a spectrum (hierarchy) of relaxation times. We have used studies of the irreversible evolution of highly photoexcited plasmas in polar semiconductors to provide a way to exemplify and test the existence of such a spectrum of characteristic times. It is shown that, in fact, several kinetic stages can be characterized, each accompanied by a successive contraction in the description of the macroscopic state of the system. A proper choice, depending on the experimental conditions, leads to good agreement with observational data. © 1990.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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