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Rate coefficients for pure rotational quenching in H2(ν 1 = 0, j 1) + H2(ν 2 = 0, j 2) collisions from initial levels of j 1 = 2–31 (j 2 = 0 or 1) to all lower rotational levels are presented. We carried out extensive quantum mechanical close-coupling calculations based on a recently published H2–H2 potential energy surface (PES) developed by Patkowski et al. that has been demonstrated to be more reliable than previous work. Rotational transition cross sections with initial levels of j 1 = 2–14, 18, 19, 24, and 25 were computed for energies ranging from 10−6 to 1000 cm−1, while the coupled-states approximation was adopted from 2000 to 20,000 cm−1... See full text for full abstract.
Molecular data; Molecular processes; Scattering
Astrophysics and Astronomy | Chemistry
Yang, B. H.,
Stancil, P. C.,
Parekh, N. J.,
Forrey, R. C.
Collisional Quenching of Highly Excited H2 due to H2 Collisions.
Astrophysical Journal, 862(2),