Resonances at very low temperature for the reaction D$_2$+H

TL;DR

This paper presents numerical calculations of reaction and vibrational quenching rates for H colliding with D$_2$ at ultracold temperatures, revealing resonant structures sensitive to initial states and comparing with similar reactions.

Contribution

It provides the first detailed analysis of resonances in D$_2$+H reactions at ultracold temperatures, highlighting state-dependent effects and implications for ultracold chemistry.

Findings

Resonant structures observed in reaction rates between 0.01 and 10 K.

Reaction rates vary significantly with initial rovibrational states.

Comparison shows differences and similarities with H$_2$+D reaction results.

Abstract

We present numerical results for rate coefficients of reaction and vibrational quenching in the collision of H with D$_2(v,j)$ at cold and ultracold temperatures. We explore both ortho-D$_2(j\!=\!0)$ and para-D$_2(j\!=\!1)$ for several initial vibrational states $(v\leq 5)$, and find resonant structures in the energy range 0.01--10 kelvin, which are sensitive to the initial rovibrational state $(v,j)$. We compare the reaction rates for D$_2$+H with our previously obtained results for the isotopologue reaction H$_2$+D, and discuss the implications of our detailed study of this benchmark system for ultracold chemistry.