Zeeman relaxation of MnH (X7{\Sigma}+) in collisions with 3He: mechanism and comparison with experiment

TL;DR

This paper provides a theoretical analysis of Zeeman relaxation in MnH molecules colliding with 3He, elucidating the relaxation mechanism, its dependence on magnetic fields, and comparing predictions with experimental data.

Contribution

It introduces a detailed theoretical model for Zeeman relaxation in MnH-3He collisions, highlighting the negligible role of certain transitions and assessing the impact of three-body interactions.

Findings

Levels with ΔMj>2 contribute negligibly to relaxation.

The relaxation cross section depends on the accuracy of three-body interactions.

Comparison shows good agreement with experimental cross sections.

Abstract

We present a theoretical study of the Zeeman relaxation of the magnetically trappable lowest field seeking state of MnH(^7 \Sigma) in collisions with 3He. We analyze the collisional Zeeman transition mechanism as a function of the final diatomic state and its variation as a function of an applied magnetic field. We show that as a result of this mechanism the levels with \Delta Mj>2 give negligible contributions to the Zeemam relaxation cross section. We also compare our results to the experimental cross sections obtained from the buffer gas cooling and magnetic trapping of this molecule and investigate the dependence of the Zeeman relaxation cross section on the accuracy of the three body interaction at ultralow energies.