Contents 1. Introduction 2 2. Background 5 2.1 The spectrum of density fluctuations 5 2.2 Brillouin scattering cross-section 9 3. Experimental 14 3.1 BLS: The tandem multipass Fabry–Perot interferometer 14 3.2 Inelastic ultraviolet scattering 16 3.3 Inelastic X-ray scattering 18 4. Liquids and Glass Transition 22 4.1 Introduction 22 4.2 Structural and secondary relaxations approaching the glass transition 23 4.3 Brillouin scattering and relaxation processes through the liquid–glass transition 28 4.4 Acoustic analysis: Sensitivity of Brillouin scattering to secondary relaxations 31 4.5 Full spectrum analysis: Divergence of a relaxation time and a–b splitting 39 4.6 Experimental determination of the nonergodicity factor 49 5. Glasses 59 5.1 Introduction 59 5.2 More on QES: Correlation between collective and tagged particle dynamics 60 5.3 More on BP: Breakdown of the Debye approximation for the acoustic modes with nanometric wavelengths in glasses 64 6. Future Developments 67
Progress in Liquid and Glass Physics by Brillouin Scattering Spectroscopy
FIORETTO, Daniele
2012
Abstract
Contents 1. Introduction 2 2. Background 5 2.1 The spectrum of density fluctuations 5 2.2 Brillouin scattering cross-section 9 3. Experimental 14 3.1 BLS: The tandem multipass Fabry–Perot interferometer 14 3.2 Inelastic ultraviolet scattering 16 3.3 Inelastic X-ray scattering 18 4. Liquids and Glass Transition 22 4.1 Introduction 22 4.2 Structural and secondary relaxations approaching the glass transition 23 4.3 Brillouin scattering and relaxation processes through the liquid–glass transition 28 4.4 Acoustic analysis: Sensitivity of Brillouin scattering to secondary relaxations 31 4.5 Full spectrum analysis: Divergence of a relaxation time and a–b splitting 39 4.6 Experimental determination of the nonergodicity factor 49 5. Glasses 59 5.1 Introduction 59 5.2 More on QES: Correlation between collective and tagged particle dynamics 60 5.3 More on BP: Breakdown of the Debye approximation for the acoustic modes with nanometric wavelengths in glasses 64 6. Future Developments 67I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.