A master plot for fy* as a function of x is shown in Fig.9. As is seen, the value of the critical exponent v* in Eq.16 for all solutions studied in the hydrodynamic regime q ^«1 around the 0 temperature is v*=0.8±0.1 which value as yet has no theoretical justification. At smaller x, generally at x ~ 0.01, the decay rate becomes independent of temperature characterizing entry to the critical non-diffusive regime [33]. There is a consequent observed "flattening-out'' of the bare dynamic correlation length, defined via Eq.12, as a function of x to a limiting value as TC is approached. The variation of the dynamic correlation length with x changes dramatically if Eq.( 13) is used to define ^due to significant difference in the temperature variation of -q 5 and -q m described by Eq. 14 and 15, respectively (Fig10). In the vicinity of the © temperature the temperature variation of d and similarly that of the static correlation length, is described by the mean field critical index v=0.5 (Eq.17). At some "intermediate dynamic crossover temperature" Tx* the index increases abruptly and the crossover to the critical non-diffusive regime is observed. We note that in the "intermediate" region of t the critical index v=0.72 exceeds the theoretical value of n- 0.63 probably due to a complex interference between the dynamic and static correlations of the order of ©) and/or Rg(see Eqs.7 and 8). At the same time, the crossover to the critical non-diffusive regime occurs at about the same value of x~0.01 forboth ^and l^*.


y 101

0 0

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