Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session K00: Poster Session II (4pm-6pm CDT)
4:00 PM,
Wednesday, June 5, 2024
Room: Hall BC
Abstract: K00.00012 : Experimental study of cold collision between metastable Krypton and Rubidium atoms*
Presenter:
Wei Jiang
(University of Science and Technology of China)
Authors:
Yu chan Wang
(university of science of technology of china)
Wei Jiang
(University of Science and Technology of China)
Here we report on a cold collision experiment between metastable Kr (Kr*) and Rb atoms. Our approach combines laser trapping and manipulation with velocity mapping imaging (VMI) techniques. The Kr* atoms are first loaded into a Magneto-Optical Trap (MOT). To study the Kr*-Rb ionization reaction, the cold Kr* atoms are launched toward Rb atoms in the ground state by a moving molasses with a controlled collision energy. The ion products produced at the center of the collision region are analyzed with a VMI system. Rb-Kr* reaction cross-sections between 15 mK to 3 K are measured. We observed pronounced dependence of the reaction cross-section on collision energies. The most notable feature is that the reaction is suppressed at the collision energy about 125 mK, which could be a result of interference between different partial waves or formation of molecular superexcited states. Comparison between experiments and high precision quantum chemistry calculations in the future may shed more lights on the dynamics of the cold Rb-Kr* collision process.
*This work was supported by the National Science Foundation of China (Grant No. 22241303, 1974332)
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