Observation of the 
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-wave shape resonance in atom-molecule collisions

Margulis, Baruch; Paliwal, Prerna; Skomorowski, Wojciech; Pawlak, Mariusz; Żuchowski, Piotr S.; Narevicius, Edvardas

doi:10.1103/physrevresearch.4.043042

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…However, an effective way to select states with a certain amount of total angular momentum is to leverage different shape resonances of the neutral collision complex. This could be done with the merged beam approach, in which collision dynamics could be tuned down to a single quantum of angular momentum ( 36 ). Performing coincidence experiments in the p -wave limit will demonstrate the control of the final-state distribution.…”

Section: Discussionmentioning

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: Discussionmentioning

confidence: 99%

Tomography of Feshbach resonance states

Margulis

Horn

Reich

et al. 2023

Science

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“…307 With all of these wonderful tools in place, new observations were guaranteed. By scanning the collision energy, reaction resonances were detected for Penning ionization [308][309][310][311] and rotationally inelastic collisions. 312 A key element of these observations followed the pioneering work on F + H 2 reaction resonances seen at much higher energies; 202,313 as in that work, by obtaining the incidence-energy dependence of a small angular fraction of the differential scattering angular distribution, the resonances could be directly seen.…”

Section: Cold Collisionsmentioning

confidence: 99%

Spiers Memorial Lecture: New directions in molecular scattering

Schatz,

Wodtke,

Yang

2024

Faraday Discuss.

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“…The shape resonance is an important tool to modify the interparticle interaction in field-free collisions [44,45]. When a resonance occurs, the long-range wave function tunnels into the inner region.…”

Section: The Low-energy 40 K-133 Cs Collisionsmentioning

confidence: 99%

Comparison of log-derivative and renormalized Numerov methods in low-energy two-body collisions

Xie,

Li,

Sun

2023

Phys. Scr.

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The log-derivative (LOGD) and renormalized Numerov (RN) methods are popularly used in inelastic and reactive scattering calculations. The computational precision of two methods and their improved versions are compared in two-body diatomic and bimolecular collisions at low temperatures. In diatomic 40K-133Cs collision example the single-channel calculations show the solution-improved RN method has the advantage over others when large fixed propagating interval used. The relative error of local scattering length in different propagating sectors are explored. In multi-channel 40K-133Cs collisions the predicted positions of Feshbach resonances by using mapping grid points indicate strong potential-following character in LOGD methods, which is consistent with the analysis on local scattering length in single-channel calculations. In multiple open-channel calculations the elastic and inelastic scatterings and their dependence on collision energy are compared as well. In bimolecular 23Na87Rb-23Na87Rb long-range reactive scattering example the elastic and reactive rate coefficients are investigated. The original LOGD method displays surprisingly relatively high accuracy with less mapping grid points and a wide range of mapping parameters. By increasing the number of mapping grid points the improved LOGD exhibits definitely superiority on precision with proper mapping parameters. We demonstrate our consequent is applicable in other colliding systems.

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Observation of the p -wave shape resonance in atom-molecule collisions

Cited by 3 publications

References 32 publications

Tomography of Feshbach resonance states

Tomography of Feshbach resonance states

Spiers Memorial Lecture: New directions in molecular scattering

Comparison of log-derivative and renormalized Numerov methods in low-energy two-body collisions

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