Fluorescence of SiO Condensate in Near Infrared Region

SiO凝聚体在近红外区的荧光

基本信息

批准号：
04804009
负责人：
WADA Setsuko
金额：
$ 1.22万
依托单位：
Univ.of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

In reflection nebulae, extended red excess emission(ERE)are observed. The emission is come from the dust irradiated with emission of a central star. Authors proposed the emission can be caused by the carbonaceous dust alike quenched carvonaceous composite(QCC, ApJ1992). A dust, which has Si-O network structure, may exit in reflection nebulae. In this work, we measured fluorescence spectra of SiO condensates and discussed contribution of the SiO fluorescence to the ERE.We made three kinds of SiO condensate materials ; (1) SiO condensate which was made as a deposit from SiO gas, (2) oxidize SiO condensate which was made with an exposure of the SiO condensate to air, (3) thermally altered SiO condensate which was made with heating of the SiO condensate to 650 C in vacuum.We measured fluorescence spectra of the SiO condensate materials with two spectroscopy systems ; in one system, Ar laser (488.4 nm, 2mW)is used for excitation and two kinds of dectors, Si detector (500-1000 nm)and Ge detector(750-1500 nm), are used for detection and in the other system, Hg-Xe lamp (313nm)is used for excitation and two kinds of dectors, photo-multiplier (R666 and R376, 400-800 nm)and Ge detector (750-1500 nm), are used for detection.In both fluorescence measurements of untreated SiO condensate and thermally altered SiO condensate, we did not detect obvious emission. In the measurement of oxidized SiO condensate weak yellow emission with a peak wavelength at 480-550 nm was detected with using the photo-multipliers.According to our measurement, the "SiO condensate dust" cannot be a candidate of the ERE emitter in the reflection nebulae.

在反射星云中，观察到延长的红色过量发射（ERE）。发射来自中央恒星的发射辐射的灰尘。作者提出，发射可能是由碳质灰尘淬灭的木质复合材料（QCC，APJ1992）引起的。具有SI-O网络结构的灰尘可以在反射星云中退出。在这项工作中，我们测量了SIO冷凝物的荧光光谱，并讨论了SIO荧光对ERE的贡献。我们制作了三种SIO冷凝水材料。（1）SIO冷凝水是由SIO气体沉积的，（2）用Sio冷凝物暴露于空气中的SIO冷凝物，（（3）用真空中的Sio冷凝物加热至650 c的SIO冷凝物，在真空中加热到650 c。 in one system, Ar laser (488.4 nm, 2mW)is used for excitation and two kinds of dectors, Si detector (500-1000 nm)and Ge detector(750-1500 nm), are used for detection and in the other system, Hg-Xe lamp (313nm)is used for excitation and two kinds of dectors, photo-multiplier (R666 and R376, 400-800 nm）和GE检测器（750-1500 nm）用于检测。在未处理的SIO冷凝物和热改变的SIO冷凝物的荧光测量中，我们没有检测到明显的发射。在测量氧化的SIO凝结物弱黄色发射时，使用光 - 层次在480-550 nm处检测到峰值波长。根据我们的测量，“ SIO冷凝水粉尘”不能成为反射Nebulae中ERE EMITTER的候选者。