Stereodynamics of rotationally inelastic scattering in cold He + HD collisions
Abstract
Stereodynamics of cold collisions has become a fertile ground for sensitive probe of molecular collisions and control of the collision outcome. A benchmark system for stereodynamic control of rotational transition is He + HD. This system was recently probed experimentally by Perreault et al. by examining quenching from j = 2 to j′ = 0 state in the v = 1 vibrational manifold of HD. Here, through explicit quantum scattering calculations on a highly accurate ab initio interaction potential for He + H2, 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. Furthermore, for collision energies below 0.5 cm−1, it is shown that stereodynamic preference for the integral cross section follows a simple universal trend.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 03, 2020
- Source ID
- 10.1063/5.0022190
Entities
People
- Masato Morita
- N Balakrishnan
Organizations
- National Science Foundation
- United States Department of Defense
- University of Nevada, Reno