Ultrasonic Attenuation and Relaxation Times in Water Vapor and Heavy-Water Vapor

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 1966 English Publisher:Acoustical Society of America (ASA)Journal:The Journal of the Acoustical Society of America, volume 39, pages 250-254 (issn: 0001-4966, eissn: 1520-8524,

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Authors: Kazunari Yamada; Yahei Fujii;

doi: 10.1121/1.1909882

Ultrasonic Attenuation and Relaxation Times in Water Vapor and Heavy-Water Vapor

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Abstract

Ultrasonic attenuation in water vapor and heavy-water vapor has been measured over the range of angular frequency/pressure from 10 to several hundred radian megacycles per second/atmosphere about 137°C. The resulting vibrational relaxation time at 1 atm for H2O vapor comes out to be about (8±2.5) × 10−9 sec and that in D2O vapor to be about (7.0±1.0) × 10−9 sec.

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