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Type: Artigo de periódico
Title: Optical kerr effect in supercooled water
Author: Skaf, MS
Sonoda, MT
Abstract: We present molecular dynamics simulations of the optical Kerr effect in liquid and supercooled water and compare with recent time-resolved Kerr spectroscopy measurements [R. Torre , Nature (London) 428, 296 (2004)]. The short time features of the Kerr response, characterized by peaks near 15, 60, and 160 fs, are weakly temperature dependent. The long-time decay is well described by a stretched exponential with a nearly constant stretch parameter and relaxation times that follow a power law similar to(T-T-S)(-gamma), with T-S=198.3 K and gamma=2.35. Our findings are discussed in the light of the spectroscopy data and previous simulation analyzes of the structural relaxation in supercooled water.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review Letters. Amer Physical Soc, v. 94, n. 13, 2005.
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.94.137802
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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