Two‐photon spectroscopy of the A 2Σ+–X 2Πi system of OH
Two‐photon spectroscopy of the A 2Σ+–X 2Πi system of OH
复制标题
OH的A 2Σ+–X 2πi体系的双光子光谱
DOI：
10.1063/1.445620
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
Gregory P Smith
中科院分区：
文献类型：
--
作者：
D. Crosley;Gregory P Smith
研究了在甲烷-空气火焰的燃烧气体中产生的OH分子的A2 π +− X2 Πi系统的双光子激光诱导荧光。在（0，0）带中识别出100多条转动谱线，测得的谱线强度与计算值一致。（0，0）带的绝对截面在2到8× 1,0 −32 cm 4/W之间，（0，0）、（1，1）和（1，0）的相对强度为100：25：1。将这些与理论计算进行比较，以确定负责吸收强度的中间状态。通过假设A和X态的v，J能级附近都是中间态，得到了与绝对量和两个比值很好的一致性。
Two‐photon laser‐induced fluorescence of the A 2Σ+−X 2Πi system of the OH molecule, produced in the burnt gases of a methane‐air flame, has been studied. Over 100 rotational lines in the (0,0) band have been identified and the measured line strengths agree with calculations. The absolute cross section for the (0,0) band is between 2 and 8×10−32 cm4/W and the relative intensities for (0,0), (1,1), and (1,0) are 100:25:1. These are compared with theoretical calculations in order to identify the intermediate state(s) responsible for the absorption strength. Good agreement with the absolute magnitude and both ratios is obtained by assuming that nearby v, J levels of both the A and X states serve as the intermediates.