Stereodynamics of rotationally inelastic scattering in cold He+HD collisions

Abstract

Stereodynamics of cold collisions has become a fertile ground for quantized studies of molecular collisions and control of the collision outcome. A benchmark process for stereodynamic control is rotational transition in He+HD collisions. This process was recently probed experimentally by Perreault et al. by examining quenching from $j=2$ to $j^{\prime }=0$ state in the $v=1$ vibrational manifold. Here, through explicit quantum scattering calculations on a highly accurate ab initio interaction potential for He+H${}_2$, we reveal how a combination of two shape resonances arising from $l=1$ and $l=2$ partial waves controls the stereodynamic outcome rather than a single $l=2$ partial wave attributed in the experiment. Further, for collision energies below 0.5 cm${}^{-1}$, it is shown that stereodynamic preference for integral cross section follows a simple universal trend.

6 pages, 4 figures and 35 references and Supplementary Material (10 pages, 8 figures)

References in corpus (2)

• Cold molecules: Progress in Quantum Engineering of Chemistry and Quantum Matter
• Stereodynamic control of overlapping resonances in cold molecular collisions

Cited by in corpus (5)

• The role of low energy resonances in the stereodynamics of cold He+D2 collisions
• Stereodynamical control of cold collisions between two aligned D2 molecules
• On the use of stereodynamical effects to control cold chemical reactions: the H + D${}_2⟷$ D + HD case study
• Rovibrational (de-)excitation of H${}_2$ by He revisited
• Universal stereodynamics of cold atom-molecule collisions in electric fields