摘要:
利用同步辐射和多级光电离吸收池,在14—20eV(890—620)范围内测量了CO绝对光吸收谱,得到了CO离子态的电离能.根据CO绝对光吸收谱,结合理论计算,分别识别了收敛到CO+三个电子态(Χ2Σ+,Α2Π和B2Σ+)的Rydberg系列.不仅扩充了前人识别的Rydberg系列和振动序列,而且探索性地识别了收敛到CO+基态X2Σ+(ν+=2和3)的Rydberg系列Rx-Ⅰ,和收敛到CO+(Α2Π)电子态的量子数n=2(真实值等于3)的振动序列.与此同时,本文也深入讨论了17.0—17.5eV(730—710)范围内CO吸收光谱的特征.
Abstract:
Absolute photoabsorption spectrum of CO molecule in the region 14—20 eV(620—890 ) is measured using synchrotron radiation and multi-stage photoionization chamber, and its ionization energy is obtained. According to the absorption spectrum of CO and theoretical calculation, the Rydberg series converging to the Χ2Σ+, Α2Π, and B2Σ+ states of CO+ are assigned separately. Rydberg series assigned before are extended, Rydberg series converging to the Χ2Σ+ (ν+=2 and 3) of CO+, and n=2 (the real value of n is 3) progressions of the series converging to the Α2Π state of CO+ are identified. At the same time, the absorption spectrum of CO in the region 17.0—17.5 eV (710—730 ) is also discussed deeply.