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arXiv 2211.09015physics.chem-ph
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低温缓冲气体池中多普勒效应的测量

Measurement of Doppler effects in cryogenic buffer-gas cell

Ayami Hiramoto, Masaaki Baba, Katsunari Enomoto, Kana Iwakuni, Susumu Kuma, Yuiki Takahashi, Reo Tobaru, Yuki Miyamoto

AI总结:

本研究在约5 K氦缓冲气体铜池中对CaOH低J跃迁进行高分辨吸收光谱,利用反向传播激光测量多普勒效应,并以专用蒙特卡洛模拟比较宽度与频移的时间演化。

摘要:

缓冲气体冷却是一种适用于分子的通用冷却技术,并被用于多种目的。其应用之一是利用缓冲气体池内的分子进行低温光谱学研究。尽管预计池内会产生高强度信号,但复杂的分子动力学是精密光谱学的一个缺点。在本研究中,我们对氢氧化钙(CaOH)的$\ ilde{A}^2Π(0,0,0)-\ ilde{X}^2Σ^+(0,0,0)$能带中的低J跃迁进行了高分辨吸收光谱测量。CaOH分子通过在铜池中进行激光烧蚀产生,并使用氦缓冲气体冷却至约5 K。我们通过向池内注入反向传播的激光,探测了缓冲气体池中的多普勒效应。采用专用的蒙特卡洛模拟对多普勒宽度和频移的时间演化进行了模拟,并与实验数据进行了比较。

英文摘要:

Buffer-gas cooling is a universal cooling technique for molecules and used for various purposes. One of its applications is using molecules inside a buffer-gas cell for low-temperature spectroscopy. Although a high-intensity signal is expected in the cell, complex molecular dynamics is a drawback for precise spectroscopy. In this study, we performed high-resolution absorption spectroscopy of low-J transitions in the $\tilde{A}^2Π(0,0,0)-\tilde{X}^2Σ^+(0,0,0)$ band of calcium monohydroxide (CaOH). CaOH molecules were produced by laser ablation in a copper cell and cooled to $\sim$5\,K using helium buffer gas. We probed the Doppler effects in a buffer-gas cell by injecting counter-propagating lasers inside the cell. The time evolutions of the Doppler width and shift were simulated using a dedicated Monte Carlo simulation and compared with data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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