研究表明：转动激发截面对势能表面的方向性和散射角都非常敏感。
It is shown that the rotational excitation cross sections are sensitive to the directionality of potential surface and scattering Angle.
本文扼要阐述了在库仑波玻恩近似下，电子与离子碰撞激发截面的理论推导。
This paper briefly describes the theoretical deduction of the cross section of electron -ion impact excitation in Coulomb -born approximation.
在可见光范围给出了所观察到的各条谱线的发射截面及相应上能级的激发截面。
The emission cross sections of the observed lines and the excitation cross sections of the corresponding states are obtained in the visible region.
而且，随着溶剂极性的增加，激发态的激发能减小，双光子吸收截面增大。
Furthermore, with the increase of the polarity of solvent, the excited energies is decreased and the tpa cross section is increased.
结果表明：这种玻璃具有较宽的荧光半高宽、较大的受激发射截面，较好的热稳定性。
It is found that these kinds of glasses have good thermal stability, broad FWHM and large stimulated emission cross-section.
通过曲线拟合，得出了它们的激发态吸收截面。
Excited state absorption cross sections are obtained through Z-scan curve fitting.
数值计算结果表明：当量子线截面半径减小时，基态和第一激发态能量都将单调增加。
The numerical results show, with the decreasing radius of the quantum wires, the ground state energies and the first excited state energies increase mononically.
然而，理论和实验的一些偏离表明集体激发在C60光电离截面中起重要作用，考虑集体激发的改进模型是必要的。
The important role of collective excitation in the photoionization cross-section of C60 is suggested. Improvement of the model by taking into account the collective excitation is indicated.
然而，理论和实验的一些偏离表明集体激发在C60光电离截面中起重要作用，考虑集体激发的改进模型是必要的。
The important role of collective excitation in the photoionization cross-section of C60 is suggested. Improvement of the model by taking into account the collective excitation is indicated.
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