To investigate the dynamical origin of these oscillatory structures, we calculated the J = 0 TID scattering wave functions at the collision energy of 0.136 eV by performing Fourier transformation of the TD wave functions. Figure shows the two-dimensional contour of the scattering wave functions in both the reactant Jacobi coordinates (R H2-OD , r H2 ) and the product Jacobi coordinates (R H-HOD and r H-OD ). It can be seen that the wave functions are localized in the transition state region, with a slight bias toward the product side. There exist three nodes along the H-OD coordinate inside the transition state region, but only two node for the outgoing wave function with a sudden decrease in amplitude. This sudden change of nodal structure and amplitude in wave function is the characteristic feature of a Feshbach resonance, indicating the resonance is trapped in HOD(v OH =3) vibrational adiabatic well and produces mainly HOD(v OH =2) product.