Elucidation the cause of the red emission of quenched carbonaceous composite (QCC)

阐明淬火碳质复合材料（QCC）红光发射的原因

• 批准号: 08640325
• 负责人: NARISAWA Takatoshi
• 金额: $ 1.47万
• 依托单位: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640325/
• 关键词: extended red emission; reflection nebulae; dust; Interstellar dust; ERE; extinction; ERE; 赤色発光; 塵

We explained good comparison with the spectrum of quenched carbonaceous composite (QCC) and the observed spectrum which regarded as a chracteistic of interstellar dust in wide spectroscopic region the extended from ultraviolet to infrared. When the measured temperature changes, a lot of organic material causes a change in shape of a spectrum and causes a shift of spectrum position. This study was done with a purpose to know how the spectrum of QCC changed for temperature change.QCC is a quenched product, or condensate, formed from a hydrocarbon plasma. We collectd the QCC on a quartz substrate inside a vacuum chamber and measured its emission spectrum at room temperature, 77K and 1.5K.The fluorescence spectrum of filmy-QCC showed only a single broad feature. The peak wavelength and intensity of aspectrum hardly changed by temperature, but the band width (hwhm) did decrease4-6nm at low temperature. This low temperature spectrum showed good agreement with that of the extended red emission (ERE) observed in reflection nebulae. On the other hand the fluorescence spectrum from the different place of a substrate, far from injecting nozzle, showed the peak wavelength shifted to the short wavelength side and showed a few small humps. This spectrum showed agreement with the broad background ERE band spctrum of Red Rectangle. We suggested that a material similar in nature to that of the filmy-QCC may be a major component of interstellar dust.In a further experiment we want to measure the fluorescence spectrum and its quantum efficiency when the QCC excited by various wavelength of ultraviolet rays. From such experiment, important inforamation will be provided about a wavelength of ultraviolet rays effective for ERE,amount of ultraviolet rays, dust density, distribution of dust, and so on.

我们解释了与淬火碳质复合材料（QCC）光谱和观测光谱的良好比较，该光谱被视为星际尘埃在从紫外到红外的宽光谱范围内的特征。当测量的温度发生变化时，大量有机物质会引起光谱形状的变化并引起光谱位置的移动。这项研究的目的是了解 QCC 的光谱如何随温度变化而变化。QCC 是一种由碳氢化合物等离子体形成的淬火产物或冷凝物。我们将 QCC 收集在真空室内的石英基板上，并在室温、77K 和 1.5K 下测量其发射光谱。薄膜 QCC 的荧光光谱仅显示出单一的广泛特征。光谱的峰值波长和强度几乎不随温度变化，但带宽(hwhm)在低温下减少了4-6nm。该低温光谱与反射星云中观察到的扩展红色发射（ERE）光谱非常吻合。另一方面，来自远离注射喷嘴的基底的不同位置的荧光光谱显示峰值波长移至短波长侧并显示一些小驼峰。该光谱显示与红色矩形的宽背景 ERE 带光谱一致。我们认为，一种与薄膜状QCC性质相似的材料可能是星际尘埃的主要成分。在进一步的实验中，我们希望测量QCC在不同波长的紫外线激发下的荧光光谱及其量子效率。通过这样的实验，将提供对ERE有效的紫外线波长、紫外线量、粉尘密度、粉尘分布等重要信息。