Low-Q Brillouin scattering from glasses

被引：3

作者：

Courtens, Eric ^{[1
]}

Ruffle, Benoit ^{[1
]}

Vacher, Rene ^{[1
]}

机构：

[1] Univ Montpellier 2, UMR CNRS 5587, LCVN, Grp Phys Verres & Spect, F-34095 Montpellier 5, France

来源：

JOURNAL OF NEUTRON RESEARCH | 2006年 / 14卷 / 04期

关键词：

Brillouin scattering; Sound damping; Acoustic attenuation; Glasses; Ioffe-Regel crossover; Boson peak;

D O I：

10.1080/10238160601049120

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A general framework for the understanding of Brillouin scattering spectra observed in glasses with light, X-rays, or neutrons is presented. Several sources of acoustic damping are discussed. Crossovers between different damping regimes can occur, depending on the glass and on the temperature. Generally, the damping of sound culminates in the THz frequency range with a Ioffe-Regel limit corresponding to a resonance with the boson peak. This limit should be of direct relevance to BRISP, as the instrument will mostly operate in that region.

引用

页码：361 / 366

页数：6

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