论文标题
基本条带的sub-ppb测量高清的基本带旋转过渡
Sub-ppb measurement of a fundamental band rovibrational transition in HD
论文作者
论文摘要
我们使用分子束中的红外 - 硫酸酯双共振光谱法直接测量了地基氢氘（HD）中0-1 R（0）振动过渡频率。地面分子是使用参考连续波红外激光的频率梳激发振动激发的，并且通过脉冲紫外线激光通过状态选择性电离检测到激发分子。我们确定了111 448 815 477（13）kHz的绝对过渡频率。 0.12分亿（PPB）的不确定性主要受剩余一阶多普勒偏移的限制。
We report a direct measurement of the 0-1 R(0) vibrational transition frequency in ground-state hydrogen deuteride (HD) using infrared-ultraviolet double resonance spectroscopy in a molecular beam. Ground-state molecules are vibrationally excited using a frequency comb referenced continuous-wave infrared laser, and the excited molecules are detected via state-selective ionization with a pulsed ultraviolet laser. We determine an absolute transition frequency of 111 448 815 477(13) kHz. The 0.12 parts-per-billion (ppb) uncertainty is limited primarily by the residual first-order Doppler shift.
