Low-frequency Raman study of water isotopes

Yuko Amo and Yasunori Tominaga

Physica A: Statistical Mechanics and its Applications, 2000, vol. 276, issue 3, 401-412

Abstract: Depolarized low-frequency Raman spectra of H2O,D2O,H218O, and D218O are measured from 266 to 350 K. The reduced Raman spectra below 250cm−1 are reproduced by a superposition of one relaxation mode and two damped harmonic oscillators. The multiple random telegraph model, which takes into account the inertia and memory effects is applied to analyze the central relaxation component. The 180cm−1 mode corresponds to vibration of the oxygen atom. The hydrogen isotopes affect the relaxation time causing its variation. The relaxation time is considered to correspond to the duration of fluctuation of the local structure in liquid water. The intensity of the 50cm−1 mode decreases with increasing temperature and finally vanishes above about 300–310 K. The 50cm−1 mode can be distinguished from the relaxation mode when the relaxation time is more than five times longer than the period of the 50cm−1 vibration mode.

Keywords: Random telegraph process; Low-frequency Raman scattering; Water (search for similar items in EconPapers)
Date: 2000
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378437199004574
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:276:y:2000:i:3:p:401-412

DOI: 10.1016/S0378-4371(99)00457-4

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().