Radboud University Nijmegen, Institute for Molecules and Materials, Heyendaalseweg 135, Nijmegen, 6525 AJ, The Netherlands.
Phys Chem Chem Phys. 2019 Jan 23;21(4):1805-1811. doi: 10.1039/c8cp06778c.
Collision-induced absorption between O2 and CO2 molecules associated with the a1Δg (v = 1) ← X3Σ-g (v = 0) band of oxygen around 1060 nm was measured using cavity ring-down spectroscopy. The lineshape for this transition is measured for the first time, and the integrated cross-section is found to be smaller than the only previous report. For pure oxygen, we find an integrated absorption value of (2.10 ± 0.31) × 10-4 cm-2 amg-2 which is in good agreement with the previous reported values. For O2-CO2 collisions we report an integrated value of (6.37 ± 1.09) × 10-5 cm-2 amg-2 which is small but still significant and not accounted for by theory.
用腔衰荡光谱法测量了 1060nm 左右氧分子的 a1Δg（v=1）←X3Σ-g（v=0）带与 CO2 分子的碰撞诱导吸收。首次测量了这个跃迁的线型，发现积分截面比以前的唯一报告小。对于纯氧，我们发现积分吸收值为（2.10±0.31）×10-4cm-2amg-2，与以前的报告值吻合较好。对于 O2-CO2 碰撞，我们报告了（6.37±1.09）×10-5cm-2amg-2的积分值，虽然较小，但仍然很显著，并且理论无法解释。
