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首页> 外文会议>ROMOPTO 2003: Seventh Conference on Optics >Cavity ring-down spectroscopy of carbon-containing molecules
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Cavity ring-down spectroscopy of carbon-containing molecules

机译：含碳分子的腔衰荡光谱

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摘要

Among other carbonaceous species, polycyclic aromatic hydrocarbons (PAHs) are of relevance for astrophysics. It is expected that they are present in the interstellar medium and they are considered as possible carriers of the diffuse interstellar bands. To prove this, absorption spectra of PAHs under conditions similar to those met in the interstellar medium should be obtained. We report here the application of cavity ring-down laser absorption spectroscopy to neutral PAHs, namely anthracene and pyrene, cooled in a supersonic jet. The absorption spectra corresponding to the S_1(0) ← S_0(0) transition of anthracene near 361 nm and to the S_2(1,0) ← S_0(0) transitions of pyrene around 321 nm and 316 nm have been studied. The results are similar to the excitation spectra previously reported in the literature.
机译：在其他碳质物种中，多环芳烃（PAH）与天体物理学有关。期望它们存在于星际介质中，并且被认为是弥散星际频带的可能载体。为了证明这一点，应该获得在星际介质中满足的条件下PAHs的吸收光谱。我们在此报告腔振铃激光吸收光谱在中性多环芳烃（蒽和pyr）中的应用，它们在超音速喷射中冷却。研究了与361nm附近的蒽的S_1（0）←S_0（0）跃迁以及321nm和316nm附近的pyr的S_2（1,0）←S_0（0）跃迁相对应的吸收光谱。结果类似于先前在文献中报道的激发光谱。

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