title: HO2 ro-vibrational bound-state calculations for large angular momentum: J = 30, 40, and 50.
abstract: The Lanczos homogeneous filter diagonalization method and the real Chebyshev filter diagonalization scheme incorporating doubling of the autocorrelation functions have been employed to compute the HO2 ro-vibrational states for high total angular momenta, J = 30, 40, and 50. For such computationally challenging calculations, we have adopted a parallel computing strategy to perform the matrix-vector multiplications. Low-lying bound states and high-lying bound states close to the dissociation threshold are reported. For low-lying bound states, a spectroscopic assignment has been attempted and the widely used approximate J-shifting method has been tested for this deep-well system. For high-lying bound states, the attempted spectroscopic assignments as well as the J-shifting approximation fail because of very strong Coriolis mixing, indicating that the Coriolis couplings are important for this system.
authors.affiliation: Centre for Computational Molecular Science, Chemistry Building (#68), The University of Queensland, Qld 4072, Brisbane, Australia.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Sean C
authors.initials: SC
authors.lastname: Smith