首页> 外文会议>Conference on Manipulation and Analysis of Biomolecules, Cells, and Tissues Jan 28-29, 2003 San Jose, California, USA >Cavity-enhanced frequency modulation absorption spectroscopy of the sixth overtone band of nitric oxide
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Cavity-enhanced frequency modulation absorption spectroscopy of the sixth overtone band of nitric oxide

机译:一氧化氮第六泛音带的腔增强调频吸收光谱

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We apply cavity-enhanced frequency modulation absorption spectroscopy (also known as NICE-OHMS) to perform highly sensitive high-resolution spectroscopy of the sixth overtone band of NO near 797 nm. Our spectrometer provides a sensitivity corresponding to a minimum detectable absorption coefficient of 2.5·10~(-10) cm~(-1)Hz~(-1/2), which is ~80 times worse than the ideal shot-noise limited sensitivity. Line intensities are measured for the R(7.5), R(9.5), and R(10.5) rovibrational lines in the ~2Π_(1/2) - ~2Π_(1/2) sub-band. From these line intensities we calculate a total vibrational band intensity of 2.2·10~(-6) cm~(-2)atm~(-1) (at 296 K) and a vibrational transition dipole moment of 4.1 μDebye. The measured values are estimated to be accurate to within +-25%.
机译:我们应用腔增强的频率调制吸收光谱法(也称为NICE-OHMS)对797 nm附近的NO的第六个泛音谱带进行高灵敏度的高分辨率光谱分析。我们的光谱仪提供的灵敏度对应于最小可检测吸收系数2.5·10〜(-10)cm〜(-1)Hz〜(-1/2),比理想的散粒噪声限制灵敏度低约80倍。 。测量〜2Π_(1/2)-〜2Π_(1/2)子带中R(7.5),R(9.5)和R(10.5)振动线的线强度。根据这些线强度,我们计算出总的振动带强度为2.2·10〜(-6)cm〜(-2)atm〜(-1)(在296 K下),振动跃迁偶极矩为4.1μDebye。估计测量值的准确度在+ -25%以内。

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