The closed-orbit theory is used for the study of the photodetachment rate of electrons from single-charged anions in presence of a homogeneous magnetic field that is perpendicular to a time-dependent electric field. The photodetachment process in the near-threshold region is achieved by a weak laser field. We describe in detail the semiclassical method to derive the general formula for the instant photodetachment rate in time-dependent systems. We find that the photodetachment rate is affected by the presence of the static magnetic field since, within the semiclassical picture, it contributes to fold back the electron trajectories back to their emission position: generating closed orbits. For weak magnetic fields, however, the number of closed orbits does not change, then the modulation of the photodetachment rate is virtually unaffected when it is compared to the case with no magnetic field. On the contrary, the modulation is clearly distinctive and complicated for strong magnetic field intensities due to the contribution of a larger number of closed orbits. Despite we provide general formulas, numerical experiments and discussions are focused on the emission of electrons as s-waves and p _z -waves.

闭轨道理论用于研究在存在与时间相关的电场垂直的均匀磁场的情况下电子从单电荷阴离子中的光脱离率。近阈值区域的光分离过程是通过弱激光场实现的。我们详细描述了推导瞬态系统中瞬时光分离率的一般公式的半经典方法。我们发现光脱离率受到静磁场存在的影响，因为在半经典图片中，它有助于将电子轨迹折回到它们的发射位置：产生闭合轨道。然而，对于弱磁场，闭合轨道的数量不会改变，那么与没有磁场的情况相比，光分离率的调制实际上不受影响。相反，由于大量闭合轨道的贡献，对于强磁场强度的调制显然是独特而复杂的。尽管我们提供了一般公式，但数值实验和讨论都集中在电子的发射上s波和p _z波。