title: A case study in ultracold reactive scattering: D + H2.
abstract: We report theoretical results for reaction and vibrational quenching of the ultracold collision D + H(2) (v, j = 0) for a wide range of initial vibrationally excited states v. The v-dependence of the zero-temperature limit of the reaction rate coefficient shows two distinct regimes: a barrier dominated regime for 0 ≤ v ≤ 4, and a barrierless regime for v ≥ 5. We also present detailed distributions over the rovibrational states of the products. We find an approximate conservation of the internal vibrational energy; namely, the branching ratios always favor the highly excited final states, which have vibrational energies similar to that of the entrance channel.
authors: University of Connecticut, Department of Physics, 2152 Hillside Road, U-3046, Storrs, CT 06269, USA. simbotin@phys.uconn.edu
authors: Ion
authors: I
authors: Simbotin
authors: Subhas
authors: S
authors: Ghosal
authors: Robin
authors: R
authors: Côté