Tomography of Feshbach Resonance States

Margulis, Baruch; Horn, Karl P.; Reich, Daniel M.; Upadhyay, Meenu; Kahn, Nitzan; Christianen, Arthur; Avoird, Ad van der; Groenenboom, Gerrit C.; Meuwly, Markus; Koch, Christiane P.; Narevicius, Edvardas

doi:10.5281/zenodo.7633162

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2023

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“…Data and materials availability: All data underlying the figures are deposited at Zenodo ( 37 ). The information for the potential energy surfaces is available at https://github.com/MMunibas/rgh2.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Tomography of Feshbach resonance states

Margulis

Horn

Reich

et al. 2023

Science

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Feshbach resonances are fundamental to interparticle interactions and become particularly important in cold collisions with atoms, ions, and molecules. In this work, we present the detection of Feshbach resonances in a benchmark system for strongly interacting and highly anisotropic collisions: molecular hydrogen ions colliding with noble gas atoms. The collisions are launched by cold Penning ionization, which exclusively populates Feshbach resonances that span both short- and long-range parts of the interaction potential. We resolved all final molecular channels in a tomographic manner using ion-electron coincidence detection. We demonstrate the nonstatistical nature of the final-state distribution. By performing quantum scattering calculations on ab initio potential energy surfaces, we show that the isolation of the Feshbach resonance pathways reveals their distinctive fingerprints in the collision outcome.

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Section: Acknowledgmentsmentioning

confidence: 99%