Bailey D Michelle, Crump Eric M, Hodges Joseph T, Fleisher Adam J
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, USA.
Faraday Discuss. 2023 Sep 20;245(0):368-379. doi: 10.1039/d3fd00019b.
We report direct frequency comb spectroscopy of the 2 band of HCN in the short-wave infrared ( = 1.56 μm) towards experimental validation of molecular line lists that support observatories like JWST. The laboratory measurements aim to test spectral reference data generated from an experimentally accurate potential energy surface (PES) and an dipole moment surface (DMS) calculated from quantum chemistry theory. Benchmarking theory with experiment will improve confidence in new astrophysics and astrochemistry inferred from spectroscopic observations of HCN and HNC. Here we describe our instrumentation and initial results using a cross-dispersed spectrometer with a virtually imaged phased array (VIPA).
我们报告了在短波红外(λ = 1.56 μm)波段对HCN ν2 带进行的直接频率梳光谱分析,旨在对支持像詹姆斯·韦布空间望远镜(JWST)这样的天文台的分子谱线列表进行实验验证。实验室测量旨在测试由实验精确的势能面(PES)和根据量子化学理论计算的偶极矩面(DMS)生成的光谱参考数据。通过实验对理论进行基准测试,将提高我们对从HCN和HNC光谱观测推断出的新天体物理学和天体化学的信心。在此,我们描述了我们使用带有虚拟成像相控阵(VIPA)的交叉色散光谱仪的仪器设备和初步结果。