Light Beating Spectroscopy of Brillouin Scattering in Solid Polymer
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概要
- 論文の詳細を見る
Hyper-resolution of the optical beating technique revealed a very accurate shape of the Brillouin spectrum, which had been deformed by the insufficient resolution of Fabry-Perot technique. The curve observed in liquid CS_2 near room temperature at the scattering angle 10.7° showed a Rayleigh peak whose height is about 100 times higher than the two Brillouin components. This spectrum shape, which is far from the triplet structure, is theoretically understood in terms of the Landau-Placzek ratio which predicts the ratio of the scattered power of Rayleigh to Brillouin components. This optical beating technique was, for the first time, used for a solid specimen ; phonon peaks were observed in acrylic resin over a range from 90 to 460 MHz. The phonon velocities thus determined showed a strong dispersion of ?ν= 40 m/s above the ultrasonic velocities obtained in the MHz range by the pulse-echo method. The phonon decay time was also determined from the width of the Brillouin peaks and correlated with the ultrasonic absorption. The results of velocity and absorption consistently suggested a broad relaxation effect expanding over 4 decades of frequency centered around 1 MHz.
- 社団法人応用物理学会の論文
- 1994-05-30
著者
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SAKAI Keiji
Institute of Industrial Science, University of Tokyo
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TAKAGI Kenshiro
Institute of Industrial Science, University of Tokyo
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Hattori K
Department Of Materials Science And Chemical Engineering Faculty Of Engineering Shizuoka University
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Matsuoka Tatsuro
Institute Of Industrial Science University Of Tokyo:(present Address)department Of Chemical Engineer
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Sakai Kiyomi
Kansai Advanced Research Center Communications Research Laboratory The Ministry Of Posts And Telecom
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Sakai K
宮崎大
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Sakai Keiji
Institute Of Industrial Science University Of Tokyo
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Takagi Kenshiro
Institute Of Industrial Science University Of Tokyo
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Hattori K
Graduate School Of Materials Science Nara Institute Of Science And Technology
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Hattori Koichiro
Institute of Industrial Science, University of Tokyo
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Takagi K
Public Works Res. Inst. Ministry Of Construction Tsukuba Jpn
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Takagi Kenshiro
Institute Of Industrial Science The University Of Tokyo
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