Measurements of High Frequency Ultrasonic Velocity and Absorption in Liquid Thiophene with High-Resolution Bragg Reflection Method

概要

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A technique of the high-resolution Bragg reflection method was utilized to study ultrasonic relaxation in liquid thiophene. Measurements were made at 10.2°and 20.0℃ for the velocity and absorption over the frequency range from 60 MHz to 400 MHz. A considerable dispersion of about 70 m/s was observed in the range and the analysis of all the data except those above 350 MHz indicated single relaxation frequencies of 281 MHz and 300 MHz at 10.2°and 20.0℃ respectively. A theoretical calculation with the assumption of vibrational relaxation, and also the experimental data above 350 MHz, suggested the presence of another relaxation at higher frequencies. The relaxation parameters were derived also from the absorption data and found to be in good agreement with those determined from the velocity data.
社団法人応用物理学会の論文
1976-06-05