High frequency viscous relaxation from the Brillouin spectra of n-pentanol

E. Di Fabrizio; V. Mazzacurati; M. Nardone; A. Nucara; G. Ruocco; G. Signorelli

doi:10.1063/1.459354

High frequency viscous relaxation from the Brillouin spectra of n-pentanol

E. Di Fabrizio^*, V. Mazzacurati, M. Nardone, A. Nucara, G. Ruocco, G. Signorelli

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Brillouin spectral line shapes of n-pentanol have been measured from -75.5°C (close to the melting point) up to 115°C (close to the boiling point) using a grating monochromator. The instrument, owing to its very high resolution, contrast, and free spectral range, has been preferred to the usually employed Fabry-Perot interferometer. The spectra, fitted with a single relaxation generalized hydrodynamic theory, support the existence of a high frequency relaxation process with an activation energy of about 9 KJ/mol. This relaxation process, which should be related to isomeric rotational relaxation, is well separated at low temperature from the structural relaxation observed at lower frequencies in ultrasonic experiments.

Original language	English (US)
Pages (from-to)	7751-7755
Number of pages	5
Journal	The Journal of chemical physics
Volume	93
Issue number	11
DOIs	https://doi.org/10.1063/1.459354
State	Published - 1990
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "High frequency viscous relaxation from the Brillouin spectra of n-pentanol",

abstract = "Brillouin spectral line shapes of n-pentanol have been measured from -75.5°C (close to the melting point) up to 115°C (close to the boiling point) using a grating monochromator. The instrument, owing to its very high resolution, contrast, and free spectral range, has been preferred to the usually employed Fabry-Perot interferometer. The spectra, fitted with a single relaxation generalized hydrodynamic theory, support the existence of a high frequency relaxation process with an activation energy of about 9 KJ/mol. This relaxation process, which should be related to isomeric rotational relaxation, is well separated at low temperature from the structural relaxation observed at lower frequencies in ultrasonic experiments.",

author = "{Di Fabrizio}, E. and V. Mazzacurati and M. Nardone and A. Nucara and G. Ruocco and G. Signorelli",

year = "1990",

doi = "10.1063/1.459354",

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T1 - High frequency viscous relaxation from the Brillouin spectra of n-pentanol

AU - Di Fabrizio, E.

AU - Mazzacurati, V.

AU - Nardone, M.

AU - Nucara, A.

AU - Ruocco, G.

AU - Signorelli, G.

PY - 1990

Y1 - 1990

N2 - Brillouin spectral line shapes of n-pentanol have been measured from -75.5°C (close to the melting point) up to 115°C (close to the boiling point) using a grating monochromator. The instrument, owing to its very high resolution, contrast, and free spectral range, has been preferred to the usually employed Fabry-Perot interferometer. The spectra, fitted with a single relaxation generalized hydrodynamic theory, support the existence of a high frequency relaxation process with an activation energy of about 9 KJ/mol. This relaxation process, which should be related to isomeric rotational relaxation, is well separated at low temperature from the structural relaxation observed at lower frequencies in ultrasonic experiments.

AB - Brillouin spectral line shapes of n-pentanol have been measured from -75.5°C (close to the melting point) up to 115°C (close to the boiling point) using a grating monochromator. The instrument, owing to its very high resolution, contrast, and free spectral range, has been preferred to the usually employed Fabry-Perot interferometer. The spectra, fitted with a single relaxation generalized hydrodynamic theory, support the existence of a high frequency relaxation process with an activation energy of about 9 KJ/mol. This relaxation process, which should be related to isomeric rotational relaxation, is well separated at low temperature from the structural relaxation observed at lower frequencies in ultrasonic experiments.

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DO - 10.1063/1.459354

M3 - Article

AN - SCOPUS:36549101909

SN - 0021-9606

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SP - 7751

EP - 7755

JO - The Journal of chemical physics

JF - The Journal of chemical physics

IS - 11

ER -

High frequency viscous relaxation from the Brillouin spectra of n-pentanol

Abstract

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