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MO: Fachverband Molekülphysik

MO 27: Poster – Collisions, Scattering and Correlation Phenomena (joint session A/MO)

MO 27.2: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Electron Capture Dynamics and Momentum Reconstruction in Ion-Neutral Collisions of Molecular Oxygen Using the Trap-REMI — •Cristian Medina and Henri Lurtz — Saupfercheckweg 1, 69117 Heidelberg

We present the momentum reconstruction and Q-value of ion-neutral collisions involving molecular oxygen (O2+* - O2*). Coincidence measurements were performed using the Trap-REMI setup, which combines reaction microscopy (REMI) with an electrostatic ion beam trap. This configuration enables collisions between stored ion species and a neutral gas jet. For the first time, we provide a complete description of a molecular collision using this setup, advancing toward coincidence measurements of electron/ion/neutral products.

In addition, we analyzed ion bunch dynamics, mass spectrometry of the collision products, and its velocity distributions. The results primarily indicate an electron capture process, transferring an electron from the neutral molecule to the ion. These findings offer valuable insights into ion-neutral collision dynamics and lay the groundwork for extending the method to systems of higher complexity that have significant implications for molecular physics, astrophysics, and atmospheric studies. measurements

Keywords: coincidence measurements; ion-neutral collisions; molecular collisions