Based on the time-dependent quantum wave packet method, the ionization dynamics of the KLi molecule are theoretically simulated using the pump–probe technique. The Autler–Townes splitting phenomenon of photoelectron spectroscopy is analyzed by changing the laser pulse width, the intensity of the probe laser pulse, and the delay time between the pump and probe pulses. It has been found that the height difference between the splitting peaks becomes larger as the width of the pump pulse increases under the resonant condition. Furthermore, the probe laser with large pulse width has little effect on the peak height difference compared with the pump pulse, but it results in multi-splitting of the photoelectron spectroscopy. Meanwhile, the effect of delay time on the splitting peaks in photoelectron spectroscopy is investigated.

基于时间相关的量子波包方法，使用泵-探针技术从理论上模拟了 KLi 分子的电离动力学。通过改变激光脉冲宽度、探测激光脉冲的强度以及泵浦和探测脉冲之间的延迟时间来分析光电子能谱的奥特勒-汤斯分裂现象。已经发现，在谐振条件下，随着泵浦脉冲宽度的增加，分裂峰之间的高度差变得更大。此外，与泵浦脉冲相比，大脉冲宽度的探针激光对峰高差的影响很小，但会导致光电子能谱的多次分裂。同时，研究了延迟时间对光电子能谱分裂峰的影响。