# Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms

## TL;DR

This study investigates the spin dependence of inelastic collisions between metastable ytterbium and ground state lithium atoms at low magnetic fields, revealing mJ-dependent behaviors and minimal mJ-changing processes.

## Contribution

It provides new experimental insights into the spin-dependent inelastic collision rates and their dependence on magnetic sublevels in Yb-Li atomic collisions.

## Key findings

- mJ-independence for Li(F=1/2) collisions
- mJ-dependence with Li(F=3/2), especially in stretched states
- Inelastic collision rates between 1e-11 and 40e-11 cm^3/s

## Abstract

Experimentally the spin dependence of inelastic collisions between ytterbium (Yb) in the metastable 3P0 state and lithium (Li) in the Li ground state manifold is investigated at low magnetic fields. Using selective excitation all magnetic sublevels mJ of 174Yb(3P0) are accessed and four of the six lowest lying magnetic sublevels of 6Li are prepared by optical pumping. On the one hand, mJ-independence of collisions involving Li(F=1/2) atoms is found. A systematic mJ-dependence in collisions with Li(F=3/2) atoms, in particular suppressed losses for stretched collisional states, is observed on the other hand. Further, mJ-changing processes are found to be of minor relevance. The span of observed inelastic collision rates is between 1*10^{-11} cm^3/s and 40*10^{-11} cm^3/s, and a possible origin of the observed behavior is discussed.