Dynamics of the S(D-1(2))+HD(j=0) Reaction at Collision Energies Approaching the Cold Regime: A Stringent Test for Theory

作者：Lara Manuel; Chefdeville Simon; Hickson Kevin M; Bergeat Astrid; Naulin Christian; Launay Jean Michel; Costes Michel^*

来源：Physical Review Letters, 2012, 109(13): 133201.

DOI：10.1103/PhysRevLett.109.133201

We report integral cross sections for the S(D-1(2)) + HD(j = 0) -%26gt; DS + H and HS + D reaction channels obtained through crossed-beam experiments reaching collision energies as low as 0.46 meV and from adiabatic time-independent quantum-mechanical calculations. While good overall agreement with experiment at energies above 10 meV is observed, neither the product channel branching ratio nor the low-energy resonancelike features in the HS + D channel can be theoretically reproduced. A nonadiabatic treatment employing highly accurate singlet and triplet potential energy surfaces is clearly needed to resolve the complex nature of the reaction dynamics.

• 出版日期2012-9-27