Abstract

We employ an accurate, ab initio potential energy surface (PES) which describes the electronic interaction energy between the molecular anion OH− (1Σ+) and the neutral rubidium atom Rb (2S), to evaluate the elastic and inelastic cross sections over a range of energies representative of the conditions of low-T experiments in MOT traps, when combined with laser-cooled rubidium gas. The system is considered to be in its vibrational ground state, while the first four rotational levels are taken to be involved in the cooling and heating collisional processes that are computed here.The corresponding cooling and heating rates up to about 35K are obtained from the calculations and compared with the recent results in a similar experiments, where He was the partner atom of the current anion.

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