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在封闭的热管炉对充有纯铯碱金属的玻璃泡进行加热和在大功率的氙灯作为非相干光源的条件下采用高分辨的AvaSpec-2048FT多通道光谱仪对铯分子蒸汽吸收光谱进行了测量,获得了325—810nm波长范围内铯分子电子态跃迁的吸收光谱,观测到了奇特的扩散带吸收谱线,并且扩散带吸收强度不依赖于温度,其中对应铯分子1(a)3∑u+→23Πg(0g+,-,1g,2g)三重态的跃迁,中心在706.6、713.2nm和719.0nm处的扩散吸收带最为明显,为研究超冷铯分子吸收谱提供了波长参考数据。
Cesium molecular vapor absorption spectra were measured using a high resolution AvaSpec-2048FT multichannel spectrometer under the condition of heating a glass tube filled with pure cesium and alkali metal in a closed heat pipe furnace and high power xenon lamp as an incoherent light source, The absorption spectrum of cesium molecule in the wavelength range of 325-810 nm was obtained. The absorption spectrum of the special diffusion band was observed, and the absorption intensity of the diffusion band was independent of the temperature. The corresponding cesium molecule 1 (a) 3Σu + → 23Πg (0g +, -, 1g, 2g) triplet transitions, the center of the diffusion absorption band at 706.6,713.2nm and 719.0nm most obvious, for the study of supercold cesium molecular absorption spectrum provides a wavelength reference data.