论文标题
测量低温缓冲液中多普勒效应的测量
Measurement of Doppler effects in cryogenic buffer-gas cell
论文作者
论文摘要
缓冲液冷却是一种用于分子的通用冷却技术，用于各种目的。它的一种应用是在缓冲 - 气体中使用分子进行低温光谱。尽管预期在细胞中会有高强度信号，但复杂的分子动力学是精确光谱的缺点。在这项研究中，我们对$ \ tilde {a}^2π（0,0,0,0） - \ tilde {x}^2σ^+（0,0,0,0）$ calcium calcium calcium Monohdroxide（CAOH）进行了高分辨率吸收光谱。 CAOH分子是通过在铜单元中激光消融产生的，并使用氦气缓冲液气冷却至$ \ sim $ 5 \。我们通过在细胞内注射反传播激光器来探测缓冲机电池中的多普勒效应。使用专用的蒙特卡洛模拟对多普勒宽度和移位的时间演变进行了模拟，并与数据进行了比较。
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.
