A new kind of light-generation mechanism: Incandescent radiation from clusters
A new kind of light-generation mechanism: Incandescent radiation from clusters
复制标题
一种新的光产生机制：来自团簇的白炽辐射
DOI：
10.1063/1.355274
复制
发表时间：
1993
影响因子：
3.2
通讯作者：
R. Scholl
中科院分区：
文献类型：
--
作者：
B. Weber;R. Scholl
介绍了一种产生高温难熔金属团簇的新技术。再生化学循环被用来在微波激励的高压放电中形成小的团簇，该放电将团簇加热到4700K(Re)或3800K(钨)。放电的发射光谱表现出很强的连续体，即团簇的白炽光辐射。连续体的光谱形状及其最大值的位置(Re：550 nm；W：700 nm)是难熔金属的特征。对星系团辐射的第一个理论描述可以基于Mie理论。对发射和吸收系数进行测量，以确定团簇的光学性质和温度。激光散射实验证明存在平均尺寸约为2.5 nm的团簇。团簇辐射的性质，特别是光谱的连续性和高的发光效率，在照明应用中具有很大的吸引力。
A novel technique to generate hot refractory metal clusters is explained. A regenerative chemical cycle is used to form small clusters inside a microwave‐excited high‐pressure discharge which heats the clusters to 4700 K (rhenium) or 3800 K (tungsten). The discharge’s emission spectrum exhibits a strong continuum, which is the incandescent radiation of clusters. The spectral shapes of the continua and the positions of their maxima (Re: 550 nm; W: 700 nm) are characteristic of the refractory metal. A first theoretical description of the clusters’ radiation can be based on the Mie theory. Measurements of emission and absorption coefficients are performed to determine the optical properties and temperatures of the clusters. The existence of clusters with an average size of about 2.5 nm is proved by a laser scattering experiment. The properties of the cluster radiation, especially the continuous spectrum and the high luminous efficiency, are attractive for lighting applications.