华东师范大学物理系精密光谱科学与技术国家重点实验室, 上海 200062
利用浓度调制光谱技术, 测量了玻璃管中放电频率20 kHz时N2的介质阻挡放电光谱。实验记录了N2的C3∏u-B3∏g 357. 7nm和N+2的B2∑+u-X2∑+g 391.4 nm的跃迁谱线光谱强度随不同电压和气体压强变化规律。实验数据显示, 保持气体压强p=130 Pa不变, 在电压较低时, 光谱强度随电压增长较快, 在电压较高时, 光谱强度增长较慢; 保持放电电压U=6.4 kV不变, 光谱强度随气压增长逐渐变小。根据电子和分子碰撞激发函数和电离函数, 建立光强随放电参数变化的物理理论模型和公式, 并对实验数据进行数学拟合, 拟合曲线与实验结果符合较好, 相关系数R>0.9。进一步明确了等离子体发射光谱强度随不同电压和气体压强变化的机理。
光谱学 交流放电 浓度调制光谱学 激发函数 电离函数
Author Affiliations
Abstract
1 Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062
2 Department of Physics, South-West China Normal University, Chongqing 400715
Photoluminescent properties of a metal-organic complex, di(8-hydroxyquinolato) zinc, impregnated in nanoporous glass were investigated. In comparison with those in the normal organic fluorescent material, the emission band of the impregnated organic phosphor became wider. Blueshift (14 nm) was observed due to (pi)*-->n emission transition. The excitation band of the embedded organic phosphor had a larger blueshift and was divided into several sub-bands. The intensity in the short wavelength end of the embedded organic fluorescent material became much stronger.
160.4890 organic materials 160.6030 silica 300.6280 spectroscopy fluorescence and luminescence Chinese Optics Letters
2004, 2(1): 0143
