Unravelling the stereodynamics of cold HD-H2 collisions

Abstract

Measuring inelastic rates with partial wave resolution requires temperatures close to a Kelvin or below, even for the lightest molecule. In a recent experiment Perreault et al. [1] studied collisional relaxation of excited HD molecules in the v = 1, j = 2 state by para- and ortho-H2 at a temperature of about 1 K, extracting the angular distribution of scattered HD in the v = 1,j = 0 state. By state-preparation of the HD molecules, control of the angular distribution of scattered HD was demonstrated. Here, we report a first-principles simulation of that experiment which enables us to attribute the main features of the observed angular distribution to a single L = 2 partial-wave shape resonance. Our results demonstrate important stereodynamical insights that can be gained when numerically-exact quantum scattering calculations are combined with experimental results in the few-partial-wave regime.

arXiv comment5 pages, 4 figures

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Cited by in corpus (13)

• Stereodynamical control of a quantum scattering resonance in cold molecular collisions
• Controlling rotational quenching rates in cold molecular collisions
• The role of low energy resonances in the stereodynamics of cold He+D2 collisions
• Stereodynamics of rotationally inelastic scattering in cold He+HD collisions
• Stereodynamical control of cold collisions between two aligned D2 molecules
• Stereodynamic control of overlapping resonances in cold molecular collisions
• Stereodynamic control of cold rotationally inelastic CO + HD collisions
• On the use of stereodynamical effects to control cold chemical reactions: the H + D${}_2⟷$ D + HD case study
• Unveiling shape resonances in H + HF collisions at cold energies
• Coherent control of reactive scattering at low temperatures: Signatures of quantum interference in the differential cross sections for F + H2 and F + HD
• Universal stereodynamics of cold atom-molecule collisions in electric fields
• Hyperfine and Zeeman interactions in ultracold collisions of molecular hydrogen with atomic lithium
• Non-adiabatic quantum interference effects and chaoticity in the ultracold Li + LiNa $\to$ Li${}_2$ + Na reaction