光谱学
腔衰荡光谱
共振(粒子物理)
吸收光谱法
吸收(声学)
化学
激发态
分子
分析化学(期刊)
原子物理学
材料科学
核磁共振
光学
物理
量子力学
复合材料
有机化学
色谱法
作者
Yan-Dong Tan,Cunfeng Cheng,D. Sheng,Shui-Ming Hu
标识
DOI:10.1063/1674-0068/cjcp2103045
摘要
Fast and accurate quantitative detection of 14CO2 has important applications in many fields. The optical detection method based on the sensitive cavity ring-down spectroscopy technology has great potential. But currently it has difficulties of insufficient sensitivity and susceptibility to absorption of other isotopes/impurity molecules. We propose a stepped double-resonance spectroscopy method to excite 14CO2 molecules to an intermediate vibrationally excited state, and use cavity ringdown spectroscopy to probe them. The two-photon process significantly improves the selectivity of detection. We derive the quantitative measurement capability of double-resonance absorption spectroscopy. The simulation results show that the double-resonance spectroscopy measurement is Doppler-free, thereby reducing the effect of other molecular absorption. It is expected that this method can achieve high-selectivity detection of 14CO2 at the sub-ppt level.
科研通智能强力驱动
Strongly Powered by AbleSci AI