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Simultaneous Detection of Photoacoustic and Fluorescence Signals

同时检测光声和荧光信号

基本信息

批准号：
63470027
负责人：
SUGITANI Yoshinori
金额：
$ 3.26万
依托单位：
Kanagawa University (1989)University of Tsukuba (1988)
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1988
资助国家：
日本
起止时间：
1988 至 1989
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63470027/
关键词：
photoacoustic fluorescence simultaneous SOR synchrotron imaging SOR光イメージング

项目摘要

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.

已经尝试使用为本目的设计的配备光声电池的x射线荧光光谱仪同时测量光声和荧光信号。对具有层状结构的金属箔和模型试样进行了联合测量。荧光测量提供了有关样品元素的信息，光声信号提供了有关样品的x射线吸收总量和热性能的信息。同样的样品也通过可见光的普通光声测量进行了检测。在组合测量中使用不同的激发波长被发现比单独使用这些技术提供更详细的关于热和结构特性的信息。利用同步辐射的单色x射线束作为激励源，成功地进行了光热偏转测量。记录了20mum厚度铜箔的信号，积分时间为12.5s，信噪比约为50。信号强度与斩波频率成反比关系。采用两种光学布置（直接和低角度偏转）来检测钼箔样品的光束偏转。在直接排列时，样品和探针束必须仔细排列，但记录的信号在信噪比上较好。