It has been reported that electron-rotation coupling plays a significant role in diatomic nuclear dynamics induced by intense VUV pulses [Phys. Rev. A 102 (2020) 033114; Phys. Rev. Res. 2 (2020) 043348]. As a further step, we present here investigations of the electron-rotation coupling effect in the presence of Auger decay channel for core-excited molecules, based on theoretical modeling of the total electron yield (TEY), resonant Auger scattering (RAS) and x-ray absorption spectra (XAS) for two showcases of CO and CH⁺ molecules excited by resonant intense x-ray pulses. The Wigner D-functions and the universal transition dipole operators are introduced to include the electron-rotation coupling for the core-excitation process. It is shown that with the pulse intensity up to 10¹⁶ W/cm², no sufficient influence of the electron-rotation coupling on the TEY and RAS spectra can be observed. This can be explained by a suppression of the induced electron-rotation dynamics due to the fast Auger decay channel, which does not allow for effective Rabi cycling even at extreme field intensities, contrary to transitions in optical or VUV range. For the case of XAS, however, relative errors of about 10% and 30% are observed for the case of CO and CH⁺, respectively, when the electron-rotation coupling is neglected. It is concluded that conventional treatment of the photoexcitation, neglecting the electron-rotation coupling, can be safely and efficiently employed to study dynamics at the x-ray transitions by means of electron emission spectroscopy, yet the approximation breaks down for nonlinear processes as stimulated emission, especially for systems with light atoms.

据报道，电子旋转耦合在由强 VUV 脉冲引起的双原子核动力学中起重要作用 [Phys. 修订版 A 102 (2020) 033114；物理。牧师水库。2 (2020) 043348]。作为进一步的步骤，我们基于总电子产额 (TEY)、共振俄歇散射 (RAS) 和 x由共振强 X 射线脉冲激发的 CO 和 CH ⁺分子的两个展示的射线吸收光谱 (XAS) 。引入了 Wigner D 函数和通用跃迁偶极子算子，以包括核心激发过程的电子旋转耦合。结果表明，脉冲强度高达 10 ¹⁶ W/cm^如图2所示，没有观察到电子-旋转耦合对TEY和RAS光谱的足够影响。这可以通过由于快速俄歇衰减通道抑制诱导电子旋转动力学来解释，即使在极端场强下也不允许有效的拉比循环，这与光学或 VUV 范围的转变相反。然而，对于 XAS 的情况，对于 CO 和 CH ^{+的情况，观察到的相对误差约为 10% 和 30%}，分别当忽略电子 - 旋转耦合时。得出的结论是，忽略电子旋转耦合的光激发的常规处理可以安全有效地用于通过电子发射光谱研究 X 射线跃迁的动力学，但对于非线性过程，作为受激发射的近似值会失效，特别是对于轻原子的系统。