Charge transfer in cold collisions of rubidium atoms with calcium and ytterbium ions

16th Russian Youth Conference on Physics and Astronomy

物理学;天文学

Yakovleva, S.A.^1 ; Belyaev, A.K.^1 ; Buchachenko, A.A.^2

Department of Theoretical Physics and Center for Advanced Study, Herzen University, St. Petersburg

191186, Russia^1

Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow

119991, Russia^2

关键词: Ab initio potential energy curves;    Centrifugal barriers;    Charge transfer mechanisms;    Coupling matrix element;    Ion atom collisions;    Low energy collisions;    Non-adiabatic transitions;    Spin-orbit couplings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/572/1/012009/pdf
DOI  :  10.1088/1742-6596/572/1/012009

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Low-energy collisions of the Ca and Yb cations with Rb atoms are investigated theoretically using accurate ab initio potential energy curves and coupling matrix elements to elucidate the dominant charge transfer mechanisms. The cross sections calculated at collision energies above 10-5cm-1exhibit the features typical to Langevin ion-atom collision regime, including a rich structure associated with the centrifugal barrier tunnelling (orbiting) resonances. It is shown that the dominant process in Yb++ Rb collisions is the radiative charge transfer, while in the case of Ca++ Rb collisions nonadiabatic transitions due to spin-orbit coupling dominate. Theoretical results are in a good agreement with available experimental data.