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.

我们解释了与淬灭的碳质复合材料（QCC）和观察到的光谱的良好比较，该光谱被认为是宽光谱区域中星际粉尘的铬酸化的频谱，从紫外线到红外延伸。当测得的温度变化时，许多有机材料会导致光谱形状变化，并导致频谱位置的变化。这项研究的目的是了解QCC的频谱如何变化以改变温度。QCC是由碳氢化合物等离子体形成的淬火产物或冷凝物。我们在真空室内的石英底物上收集QCC，并在室温，77K和1.5K处测量其发射光谱。膜-QCC的荧光光谱仅显示出一个宽阔的特征。温度的峰值波长和强度几乎不会变化，但是在低温下，带宽（HWHM）确实降低了4-6nm。该低温光谱与反射星云中观察到的延长红发射（ERE）的良好一致。另一方面，来自底物不同位置的荧光光谱远非注射喷嘴，显示出峰值波长转移到短波长侧，并显示了一些小的驼峰。该频谱表明，红色矩形的宽阔背景频带spctrum一致。我们建议，与胶片-QCC相似的材料可能是星际灰尘的主要组成部分。在进一步的实验中，当QCC受到各种紫外线射线的QCC激发时，我们希望测量荧光光谱及其量子效率。从这种实验中，将提供有关有效，紫外线量的紫外线射线波长，紫外线量，灰尘密度，灰尘的分布等。