论文标题
$^{14} $ co $ _ {2} $的室温定量以下是自然丰度，带有两个彩色腔戒指的光谱
Room-temperature quantification of $^{14}$CO$_{2}$ below the natural abundance with two-color cavity ring-down spectroscopy
论文作者
论文摘要
放射性碳的自然产生，辐射衰减和同位素稀有性使其成为探测生命和地球科学中碳质系统的独特工具。但是，当前放射性碳的难度（$^{14} $ c）检测方法限制了科学采用。在这里，两种腔腔响起的光谱检测$^{14} $ co $ _ {2} $在室温样品中，其准确性在3分钟内准确是十分之一。腔内泵浦探针测量使用两种腔体增强激光器来取消腔环降速速率波动和强大的单光子吸收干扰（> 10,000 1/s），从co $ $ _ {2} $ isotopologues的热频段过渡中。小$^{14} $ co $ _ {2} $吸收信号（<1 1/s）的选择性，室温检测减少了放射性碳的腔体增强测量的技术和操作负担，这些测量可以使生物医学研究和诸如Combosted Fossil fuuels的多种应用。
Radiocarbon's natural production, radiative decay, and isotopic rarity make it a unique tool to probe carbonaceous systems in the life and earth sciences. However, the difficulty of current radiocarbon ($^{14}$C) detection methods limits scientific adoption. Here, two-color cavity ring-down spectroscopy detects $^{14}$CO$_{2}$ in room-temperature samples with an accuracy of one-tenth the natural abundance in 3 minutes. The intra-cavity pump-probe measurement uses two cavity-enhanced lasers to cancel out cavity ring-down rate fluctuations and strong one-photon absorption interference (>10,000 1/s) from hot-band transitions of CO$_{2}$ isotopologues. Selective, room-temperature detection of small $^{14}$CO$_{2}$ absorption signals (<1 1/s) reduces the technical and operational burdens for cavity-enhanced measurements of radiocarbon, which can benefit a wide range of applications like biomedical research and field-detection of combusted fossil fuels.
