Regular Article - Atomic Physics
Photodetachment dynamics in an inhomogeneous magnetic field
School of Physics and Optoelectronic Engineering, Ludong University, 264025, Yantai, China
Accepted: 6 February 2021
Published online: 5 March 2021
The photodetachment dynamics of negative ions in an inhomogeneous gradient magnetic field is investigated for the first time. The motion of the detached electron becomes much more complicated and interesting due to the influence of the non-uniform magnetic field, and its equations of motion can be expressed in terms of Jacobi elliptic functions. The electron’s trajectory in the plane perpendicular to the magnetic field is not a simple circular motion, but can be a helical curve, a sinusoidal curve, or a balloon-shaped curve, etc. The detached electron can travel along different types of closed orbits to the ionic source, causing the returning electron wave to interfere quantum mechanically with the initial outgoing wave. For different polarized laser light, there are in-phase and anti-phase oscillations in the photodetachment cross section (PCS) of the H ion in a gradient magnetic field. In particular, we discuss the influence of the magnetic field gradient on the oscillatory structures in the PCS of this system. Our study provides some insight in understanding the electron dynamics in an inhomogeneous magnetic field, which can be used to simulate the motion of planets in astrophysics, and has guiding significance for future experimental research.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021