1989 Fiscal Year Final Research Report Summary
Simultaneous Detection of Photoacoustic and Fluorescence Signals
| Project/Area Number |
63470027
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | Kanagawa University (1989)
University of Tsukuba (1988) |
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Principal Investigator |
SUGITANI Yoshinori Kanagawa Univ. Chemistry Professor, 理学部, 教授 (80015552)
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| Co-Investigator(Kenkyū-buntansha) |
KATO Kenji Nat'l Chem.Lab.Industry Chief Researcher, 科学標準部, 主任研究員
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| Project Period (FY) |
1988 – 1989
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| Keywords | photoacoustic / fluorescence / simultaneous / SOR / synchrotron / imaging |
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| Research Abstract |
A simultaneous measurement of photoacoustic and fluorescence signals has been attempted using an X-ray fluorescence spectrometer equipped with a photoacoustic cell designed for the present purpose. The combined measurement was conducted for metal foils and model samples with layered structures. The fluorescence measurement gave information concerning the elements of the samples and the photoacoustic signal gave information Concerning the total amount of X-ray absorption and the thermal properties of the samples. The same samples were also examined through ordinary photoacoustic measurements by visible light. The use of different excitation wavelengths in the combined measurement was found to give more detailed information about the thermal and structural properties than the individual use of these techniques.
Photothermal deflection measurement was successfully carried out using a monochromated X-ray beam of synchrotron radiation as an exciting source. The signal for copper foil of 20mum thickness was recorded with integration time of 12.5s showing a signal to noise ratio of about 50. The signal intensity had a reciprocal dependency on the chopping frequency. Two optical arrangements(direct and low angle deflection) were conducted to detect the beam deflection for a molybdenum foil sample. In the direct arrangement, the sample and the probe beam must be carefully arranged, but the recorded signal was found better in signal to noise ratio.
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