Hikosaka Y, Velkov Y, Shigemasa E, Kaneyasu T, Tamenori Y, Liu J, Gel'mukhanov F
UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan.
Phys Rev Lett. 2008 Aug 15;101(7):073001. doi: 10.1103/PhysRevLett.101.073001. Epub 2008 Aug 11.
We report both experimental and theoretical studies on x-ray absorption measured in the resonant Auger scattering mode of gas phase carbon monoxide near the O1s-->2pi region. Both experiment and theory display a crucial difference between the x-ray absorption profiles obtained in the conventional and resonant scattering modes. Lifetime vibrational interference is the main source of the difference. It is demonstrated that such interference, which arises from a coherent excitation to overlapping intermediate levels, ruins the idea for obtaining x-ray absorption spectra in a lifetime broadening free regime.
我们报告了关于在气相一氧化碳的O1s→2π区域附近以共振俄歇散射模式测量的X射线吸收的实验和理论研究。实验和理论都显示了在传统散射模式和共振散射模式下获得的X射线吸收谱之间的关键差异。寿命振动干涉是这种差异的主要来源。结果表明，这种由对重叠中间能级的相干激发引起的干涉，破坏了在无寿命展宽 regime 中获得X射线吸收光谱的想法。 （注：“regime”此处可能需要结合上下文进一步准确理解其含义，暂直译为“ regime”）
