Resonant inelastic x-ray scattering spectra excited at the fluorine K resonances of SF 6 have been recorded. While a small but significant propensity for electronically parity-allowed transitions is found, the observation of parity-forbidden electronic transitions is attributed to vibronic coupling that breaks the global inversion symmetry of the electronic wavefunction and localizes the core hole. The dependence of the scattering cross section on the polarization of the incident radiation and the scattering angle is interpreted in terms of local π / σ symmetry around the S–F bond. This symmetry selectivity prevails during the dissociation that occurs during the scattering process.

中文翻译：

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SF 6中的核孔定位和超快离解

已经记录了在SF 6的氟K共振下激发的共振非弹性X射线散射光谱。虽然发现了很小但很明显的电子奇偶校验跃迁倾向，但观察到奇偶校验禁止的电子跃迁归因于振动耦合，它破坏了电子波函数的整体反演对称性并使磁芯孔局部化。散射截面对入射辐射的偏振和散射角的依赖性是根据SF键周围的局部π/σ对称性来解释的。在散射过程中发生的离解中，这种对称选择性占优势。