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Photodetachment of negative ion in an electric field near a moving surface



  1. School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025, China


Photo-detached electrondynamics of the negative ion in the electric field near a moving-surface has been investigated for the first time. This system is interesting because it provides a rudimentary model for simulating cosmic rays’ collisions with planets by looking at the detached electron’s movement in the electric field near a moving surface. In contrast to the photodetachment of negative ion in the electric field near a static surface, the detached electron’s trajectory gets much more complicated due to the influence of the moving surface. As a correspondence, the photodetachment cross section exhibits an irregular oscillatory structure compared with the stair-case structure for the same but the surface is static. Our results suggest that the photodetachment cross section of this system depends on theelectric field strength, the initial position and the speed of the moving surface sensitively. The method used in this work is universal and can be applied to study the photodetachment of non-hydrogen negative ion. Our work provides some insightsintothemoving surface effect on the photodetachment dynamics of negative ion in the electric field and mayguide the future experimental researches in the ion trap.


Moving surface effect, Photodetachment, Negative ion.

Submitted at: Jan. 14, 2020
Accepted at: Dec. 7, 2020


XIN-YUE SUN, DE-HUA WANG, TONG SHI, Photodetachment of negative ion in an electric field near a moving surface, Journal of Optoelectronics and Advanced Materials Vol. 22, Iss. 11-12, pp. 579-589 (2020)