【作者】 范希庆； 王国樑； 姜王也； 戴培英； 刘福绥；

【Author】 FAU XI-QING WANG GUO-LIANG JIANG WANG-YE DAI PEI-YING (Department of Physics, Zhengzhou University)LIU FU-SUI (Department of Physics, Peking University) Starting from the unified theory of low-frequency fluctuation, dissipation, and relexation processes, we studied the ultrasonic absorption in the thermal activation pro-cess in glasses. The theory involves only a single relaxation time and differs from the theory of distributed relaxation times. Nontheless, it can explain the experimental cha-racteristics of the ultrasonic absorption in glasses and the universality of these charac-teristics independent of kinds of materials, which couldn’t be interpreted by the pre-vious theory with the distribution of relaxation times.

【机构】 郑州大学物理系； 北京大学物理系；