Fundamental of optogalvanic laser spectroscopy based on relaxation oscilator detection and its applications.

这个研究课题已经进行了两年。调查内容包括两个方面；其中之一是对光电光谱本身的进一步研究，这是一项新发展的研究，旨在获得更高的光电效应检测灵敏度。另一个是它在细胞生物学上的应用。在基础研究部分，将针对负辉光等离子体的光电信号测量扩展到辉光放电中的正柱、法拉第暗空间、阳极辉光、阴极暗空间等所有等离子体。通过这种方法，高质量的等离子体特性测量成为可能。实验过程中，在阴极暗空间检测到异常的光电信号；也就是说，信号的极性被颠倒了。因此，实验仍在继续，以确认其新结果的可重复性。在应用方面，开始了利用适当波长的激光束照射每个癌细胞所发出的自身荧光进行癌细胞分选的研究。这种方法是拉曼光谱中包含的方法。作者开始从矿物质（如AgCl颗粒）和生物材料（如牛奶、蔬菜汁）中检测出一些斯托克斯线。我们的最终目标是发现一条反斯托克斯线，因此，实验正在有力地继续进行。

This research subject has been carried out for two years. The investigation contains two aspects ; one of them is further research of optogalvanic spectroscopy itself which was newly developed with an intent of getting higher sensitivity of detecting optogalvanic effect. The other is its application to cell biology.At the part of fundamental investigation, the measurement of optogalvanic signal targeted to the negative glow plasma was expanded to all plasma in a glow discharge like the positive column, Faraday dark space, anode glow, and the cathode dark space. By this means, a high quality measurement of plasma properties became hopeful. During this experiment, unusual optogalvanic signal was detected in the cathode dark space ; i. e., the polarity of the signal was reversed. So, experiments have been still continuing in order to confirm its reproducibility of the new result.At the part of application, the investigation for sorting cancer cell by means of autofluorescence which will be emitted from each cancer cell by the irradiation of laser beam of suitable wavelength was started. This method is the one included in the Raman spectroscopy. The authors started to detect some Stokes line from a mineral such as AgCl particle, and biomaterials like milk, vegetable juice as well. Our final aim is to detect an anti-Stokes line and so, the experiments are being powerfully continued.