High resolution probe of coherence in low-energy charge exchange collisions with oriented targets

TL;DR

This paper introduces a high-resolution experimental setup combining magneto-optical trapping and recoil-ion momentum spectroscopy to investigate coherence in low-energy charge exchange collisions with oriented Rb targets, providing detailed insights into scattering dynamics.

Contribution

The study presents a novel MOTRIMS technique that achieves unprecedented resolution in probing coherence features of charge exchange collisions involving oriented Rb atoms.

Findings

Revealed detailed features of collisional interactions.

Improved theoretical descriptions of charge exchange processes.

Validated intuitive models predicting capture transitions.

Abstract

The trapping lasers of a magneto-optical trap (MOT) are used to bring Rb atoms into well defined oriented states. Coupled to recoil-ion momentum spectroscopy (RIMS), this yields a unique MOTRIMS setup which is able to probe scattering dynamics, including their coherence features, with unprecedented resolution. This technique is applied to the low-energy charge exchange processes Na$^+$+Rb($5p_{\pm 1}$) $\rightarrow$ Na($3p,4s$)+Rb$^+$. The measurements reveal detailed features of the collisional interaction which are employed to improve the theoretical description. All of this enables to gauge the reliability of intuitive pictures predicting the most likely capture transitions.