标题： 双光子光谱中的对称性适应 显示英文标题

标题： Symmetry Adaptation in Two-Photon Spectroscopy

摘要： 对有限对称环境中的过渡离子的双光子跃迁强度的确定，应用了对称性适应技术。 我们详细讨论了组态内跃迁的情况，并简要报告了一些关于组态间跃迁的结果。 特别是对于组态内跃迁，我们描述了一个模型，该模型考虑了以下因素：对称性、二阶加三阶机制、S-、L-和J混合。 显示英文摘要

摘要： Symmetry adaptation techniques are applied to the determination of the intensity of two-photon transitions for transition ions in finite symmetry environments. We treat the case of intra-configurational transitions with some details and briefly report some results on inter-configurational transitions. In particular, for intra-configurational transitions, we describe a model which takes into account the following ingredients: symmetry, second- plus third- order mechanisms, S-, L- and J-mixings.