Bifurcation study on a degenerate double van der Waals cirque potential energy surface using Lagrangian descriptors

In this paper, we explore the dynamics of a Hamiltonian system after double van der Waals potential energy surface degenerates into single well. The is increased from bottom well up to dissociation energy, which occurs when becomes open. particular, study bifurcations basic families periodic orbits as increases using Lagrangian descriptors and Poincar\'e maps. We investigate capability find bifurcating for case resonant, saddle-node pitchfork bifurcations.