Department of Material and Life Sciences, Sophia University, Chiyoda-ku, Tokyo 102-8554, Japan.
J Phys Chem A. 2011 Apr 7;115(13):2708-18. doi: 10.1021/jp111063y. Epub 2011 Mar 15.
This paper reports on the first measurements of the electron impact electronic excitation cross-sections for carbonyl fluoride, F(2)CO, measured at 30 eV, 10° and 100 eV, 5° scattering angle, while sweeping the energy loss over the range 5.0-18.0 eV. The electronic-state spectroscopy has been investigated and the assignments are supported by quantum chemical calculations. The energy bands above 9.0 eV and the vibrational progressions superimposed upon it have been observed for the first time. Vibronic coupling has been shown to play an important role dictating the nature of the observed excited states, especially for the low-lying energy region (6.0-8.0 eV). New experimental evidence for the 6(1)B(2) state proposed to have its maximum at 12.75 eV according to the vibrational excitation reported in this energy region (11.6-14.0 eV). The n = 3 members of the Rydberg series have been assigned converging to the lowest ionization energy limits, 13.02 eV ((2)B(2)), 14.09 eV ((2)B(1)), 16.10 ((2)B(2)), and 19.15 eV ((2)A(1)) reported for the first time and classified according to the magnitude of the quantum defects (δ).
本文报道了在 30 eV、10°和 100 eV、5°散射角下，首次测量羰基氟（F(2)CO）在 5.0-18.0 eV 能量损失范围内的电子碰撞电子激发截面的结果。本文还对电子态光谱进行了研究，并通过量子化学计算支持了其归属。首次观察到了 9.0 eV 以上的能带以及叠加在其上的振动进展。振子耦合被证明在决定观察到的激发态的性质方面起着重要作用，特别是在低能区（6.0-8.0 eV）。根据本能量区（11.6-14.0 eV）报道的振动激发，提出了具有 12.75 eV 最大值的 6(1)B(2)态的新实验证据。本文首次报道了 n = 3 的里德伯系列成员收敛到最低电离能极限，分别为 13.02 eV（(2)B(2)）、14.09 eV（(2)B(1)）、16.10 eV（(2)B(2)）和 19.15 eV（(2)A(1)），并根据量子亏损（δ）的大小进行了分类。
