Rotational Energy Transfer in H2+H2

Abstract

Quantum-mechanical close-coupling calculations for state-to-state cross sections and thermal rates are reported for H2+H2 collisions. Two recently developed potential energy surfaces (PES) for the H2-H2 system are applied, namely, the global potential surface from the work of A.I. Boothroyd, P.G. Martin, W.J. Keogh, M.J. Peterson, J. Chem. Phys., 116 (2002) 666, and a restricted, model surface from the works of P. Diep, J.K. Johnson, J. Chem. Phys., 113 (2000) 3480; ibid. 112, 4465. The low temperature limit is investigated. We found significant differences in cross sections and corresponding thermal rates calculated with these two PESs.

4 Figures, 1 Table

References in corpus (1)

• State resolved rotational excitation cross sections and rates in H2+H2 collisions

Cited by in corpus (6)

• Low temperature HD + $ortho$-/$para$-H${}_2$ inelastic scattering of astrophysical interest
• Close-coupling calculations of rotational energy transfer in p-H2+HD
• A comparative study of the low energy HD+o-/p-H2 rotational excitation/de-excitation collisions and elastic scattering
• State-resolved rotational cross sections and thermal rate coefficients for ortho-/para-H2+HD at low temperatures and HD+HD elastic scattering
• Ultracold collisions between two light indistinguishable diatomic molecules: elastic and rotational energy transfer in HD+HD
• Quenching of $para$-H${}_2$ with an ultra-cold anti-hydrogen atom ${\bar{H}}_{1s}$