The application of irreversible thermodynamics in low frequency depolarized light scattering

✍ Scribed by N.D. Gershon

• Publisher: Elsevier Science
• Year: 1976
• Tongue: English
• Weight: 469 KB
• Volume: 37
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(76)85045-2

✦ Synopsis

In this work we use ;i simple tcchniquc of irrcvcrsiblc thermodynamics to derive the low frequency and low wave vector depcndcncc ofdepoiarized light scattering from fluids of 3niso~opic molecules. The results aiC the same as those derived by Ckrshon and Oppcnhcim using a molecular statistical mechanic4 npproach. Using On.zger's reciprocal relations it is shown that the fact that the poiarizability density is an even function of the psrticic velocities in contrast with the velocity itself is rcsponsiblc for the ncgstive sig,n of a possible term in the ~utocarrel3tion function of the potarizability density. This tefm z.rises from the coupling between thcsc two varjabfes and it is the cause of the negative dip in the VH spectrum at hi& tcmperaturcs in some liquids.