التفاصيل البيبلوغرافية
| العنوان: |
High frequency viscous relaxation from the Brillouin spectra of n-pentanol. |
| المؤلفون: |
Di Fabrizio, E., Mazzacurati, V., Nardone, M., Nucara, A., Ruocco, G., Signorelli, G. |
| المصدر: |
Journal of Chemical Physics; 12/1/1990, Vol. 93 Issue 11, p7751, 5p |
| مصطلحات موضوعية: |
RELAXATION (Nuclear physics), BRILLOUIN scattering |
| مستخلص: |
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. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
