Resonances at very low temperature for the reaction D₂ + H

We present numerical results for rate coefficients of reaction and vibrational quenching in the collision of H with D₂ (v, j) at cold and ultracold temperatures. We explore both ortho-D2( j=0) and para-D₂ ( j=1) for several initial vibrational states (v ≤5), and find resonant structures in the energy range 0.0110 K, which are sensitive to the initial rovibrational state (v, j). We compare the reaction rates for D₂ + H with our previously obtained results for the isotopologue reaction H₂ + D, and discuss the implications of our detailed study of this benchmark system for ultracold chemistry.