Prof. Chunlei Xiao’ group of the State Key Laboratory of Molecular Reaction Dynamics, DICP of CAS has recently reported on a combined crossed-molecular-beam experimental and theoretical study on the F + HD(v = 1) reaction to probe the possible dynamical resonances in the high-energy region of the reaction using a vibrationally excited reagent. In the case of F + HD→HF + D reaction, two broad peaks for backward-scattered HF(v′ = 2 and 3) products clearly emerge at collision energies of 0.21 kilocalories per mole (kcal/mol) and 0.62 kcal/mol from differential cross sections measured over a range of energies. They attributed these features to excited Feshbach resonances trapped in the peculiar HF (v′ = 4)–D vibrationally adiabatic potential in the postbarrier region. Quantum dynamics calculations on a highly accurate potential energy surface show that these resonance states correlate to the HD (v′ = 1) state in the entrance channel and therefore can only be accessed by the vibrationally excited HD reagent. (Science, 2013, 342, 1499-1502）