title: Differential cross section for the H+D(2)-->HD(v(')=1,j(')=2,6,10)+D reaction as a function of collision energy.
abstract: We have measured differential cross sections (DCSs) for the HD (v(')=1,j(')=2,6,10) products of the H+D(2) exchange reaction at five different collision energies in the range 1.48< or =E(coll)< or =1.94 eV. The contribution from the less energetic H atoms formed upon spin-orbit excitation of Br in the photolysis of the HBr precursor is taken into account for two collision energies, E(coll)=1.84 and 1.94 eV, allowing us to disentangle the two different channels. The measured DCSs agree well with new time-dependent quantum-mechanical calculations. As the product rotational excitation increases, the DCSs shift from backward to sideward scattering, as expected. We also find that the shapes of the DCSs show only a small overall dependence on the collision energy, with a notable exception occurring for HD (v(')=1,j(')=2), which appears bimodal at high collision energies. We suggest that this feature results from both direct recoil and indirect scattering from the conical intersection.
authors: Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
authors: Konrad
authors: K
authors: Koszinowski
authors: Noah T
authors: NT
authors: Goldberg
authors: Jianyang
authors: J
authors: Zhang
authors: Richard N
authors: RN
authors: Zare
authors: Foudhil
authors: F
authors: Bouakline
authors: Stuart C
authors: SC
authors: Althorpe