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.

解释了它与淬冷碳质复合物（QCC）的光谱以及观测到的从紫外到红外的宽光谱区的星际尘埃特征光谱的良好对比。当测量的温度变化时，大量的有机材料引起光谱形状的变化并引起光谱位置的移动。QCC是碳氢化合物等离子体形成的淬灭产物或冷凝物。在真空室中将QCC收集在石英基片上，测量了室温、77 K和1.5K下的发射光谱，薄膜状QCC的荧光光谱只有单一的宽谱线。光谱的峰值波长和强度随温度的变化不大，但在低温下，谱带宽度减小了4 - 6 nm。这个低温光谱与在反射星云中观察到的扩展红光发射（ERE）的光谱表现出很好的一致性。另一方面，从基板的不同位置，远离注射喷嘴的荧光光谱显示，峰值波长向短波长侧移动，并显示出一些小的驼峰。该光谱与红矩形的宽背景ERE带光谱一致。我们认为，一种与薄膜状QCC性质相似的物质可能是星际尘埃的主要成分，在进一步的实验中，我们将测量QCC在不同波长的紫外光激发下的荧光光谱及其量子效率。从这样的实验中，将提供关于对ERE有效的紫外线波长、紫外线量、灰尘密度、灰尘分布等的重要信息。