1993 Fiscal Year Final Research Report Summary
Development of a new experimental system for hypersonic relaxation study
| Project/Area Number |
03555011
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
応用物理学一般(含航海学)
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| Research Institution | University of Tokyo |
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Principal Investigator |
TAKAGI Kenshiro Inst.of Industrial Sci., Univ.Tokyo, Professor, 生産技術研究所, 教授 (90013218)
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| Co-Investigator(Kenkyū-buntansha) |
藤島 啓 (株)村田製作所, 技術, 研究部長
P.-K.CHOI Department of Physics, Meiji University, Lecturer, 理工学部, 講師 (30143530)
SAKAI Keiji Inst.of Industrial Sci., Univ.Tokyo, Research Associate, 生産技術研究所, 助手 (00215584)
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| Project Period (FY) |
1991 – 1993
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| Keywords | HRB method / ultrasonic relaxation / ultrasonic spectroscopy / liquid properties / biomaterials / physical acoustics |
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| Research Abstract |
Our previous study in the past few years had yielded a new ultrasonic light scattering technique which is useful for investigating dynamic properties of molecules and/or molecular associations through the measurement of ultrasonic velocity and absorption in ultra-high frequency range. The aim of the present research has been focused onto a wider distribution of this technique (high-resolution Bragg reflection technique) over the field of ultrasonic relaxation studies in soft materials, which are commonly conducted by physicists, chemists and biologists.
The major results accomplished during the past three years are :
(1) Available frequency range of ultrasonic spectroscopy was expanded over 2 GHz with sufficient resolution and accuracy.
(2) The high-resolution Bragg reflection technique was further developed into a high-resolution spectroscopy of Brillouin scattering experiment for observing high energy phonons.
(3) The newly established technique was applied for the study of molecular reorientational motion of nematogen (molecules which form nematic-liquid crystal phase below a certain temperature).
On the basis of these results, we are continuing an intensive study for even wider frequency range.
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