【摘要】 自主设计了低温吸收池其温度可以从室温到100K之间连续调节,在可调节温度区间内可以稳定在任意一个目标温度,温度的稳定性为ΔT<±1K。对低温吸收池内部结构作了详细的说明,并对温度的稳定性进行测试。用于测量1.65μm处甲烷低温吸收光谱,给出6 039.70cm-1处甲烷在296,248,198和176K低温吸收光谱的特性,并根据可调节低温吸收池的温度可调节性测量了甲烷吸收光谱在6 039.657 9cm-1处的自加宽温度依赖系数n。更多还原

【Abstract】 A new cryogenic cell was developed and could operate at any stabilized temperature ranging from room temperature down to 100 K with temperature fluctuation less than ± 1 K.The structure and performance of the cryogenic cell was given in detail and the temperature stability of the sample cell was evaluated.The methane low temperature absorption spectra at 1.65 μm were recorded at 296,248,198 and 176 K and while the characteristic of methane low temperature absorption spectra at 6 039.70 cm-1 was given.According to the characteristic of our cryogenic cell,we measured the temperature-dependent exponent n of self-broadening coefficient at 6 039.657 9 cm-1.更多还原