| Project/Area Number |
62470005
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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 |
物理化学一般
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| Research Institution | The University of Electro-Communications |
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Principal Investigator |
I'HAYA YasumasaJ. The University of Electro-Communications, 電気通信学部, 教授 (30017280)
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| Co-Investigator(Kenkyū-buntansha) |
NARISAWA Takatoshi The University of Electro-Communications, 電気通信学部, 助手 (30143712)
ITO Hirotoshi The University of Electro-Communications, 電気通信学部, 講師 (30017389)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1988: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1987: ¥3,800,000 (Direct Cost: ¥3,800,000)
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| Keywords | amplifier / spin polarization / magnetic circular dichroism / naphthoquinone / 磁気円偏光二色性(MCD) / 磁気円二色性 / 光化学初期過程 / スピン分極 / エキシマーレーザー / 三重項スピン副準位 / りん光スペクトル / 系間交差 |
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| Research Abstract |
The main object of the present project is to construct an FET amplifier which intensifies usual microwave power up to 10 - 20 W in the range of 2 GHz to 8 GHz. It is not very difficult to obtain a microwave power of such strength at a fixed wavelength, but it is a task of extreme difficult to construct a microwave sweeper having such high power in such wide wavelength region. We spent a whole year to construct an FET amplifier which can answer our purposes. The second year of the project has been devoted to invent matched attenuators. A XeCl excimer laser with a dye laser is used to pump a sample crystal to an excited singlet state from which an energy (or spin polarization) is transferred to an excited triplet state via intersystem crossing. With saturation recovery by means of the abovementioned microwave sweeper, the intensity change of the magnetic circular dichroism (MCD) of the phosphorescence spectrum is observed. Naphthoquinone and anthraquinone are investigate d with the present method and it is proved that the method works actually well to analyze the properties of triplet molecules whose phosphorescence spectra are too weak to be applied with the phosphorescence and microwave double resonance method and/or microwave induced delayed phosphorescence method.
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