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Unraveling the Stereodynamics of Cold Controlled HDH2 Collisions

James F. E. Croft, Naduvalath Balakrishnan, Meng Huang, and Hua Guo
Phys. Rev. Lett. 121, 113401 – Published 11 September 2018
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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, Mukherjee, and Zare [Nat. Chem. 10, 561 (2018).] 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.

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  • Received 29 June 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.113401

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

James F. E. Croft and Naduvalath Balakrishnan*

  • Department of Chemistry and Biochemistry, University of Nevada, Las Vegas, Nevada 89154, USA

Meng Huang and Hua Guo

  • Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, USA

  • *naduvala@unlv.nevada.edu

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Issue

Vol. 121, Iss. 11 — 14 September 2018

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