4.7 Article

Rate constants for the H+ + H2 reaction from 5 K to 3000 K with a statistical quantum method

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JOURNAL OF CHEMICAL PHYSICS
卷 154, 期 5, 页码 -

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AMER INST PHYSICS
DOI: 10.1063/5.0039629

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  1. MINECO/AEI/FEDER, UE [FIS2017-83157-P]

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An exhaustive investigation was conducted on state-to-state transitions of H+ + H-2(v, j) -> H+ + H-2(v ', j ') below 1.3 eV using a statistical quantum method, with calculated integral cross sections and rate constants. The study demonstrates the effectiveness of this approach in evaluating the cooling rate coefficient of H-2.
An exhaustive investigation of state-to-state H+ + H-2(v, j) -> H+ + H-2(v ', j ') transitions for rovibrational levels of molecular hydrogen below 1.3 eV from the bottom of the H-2 well is carried out by means of a statistical quantum method, which assumes the complex-forming nature of the process. Integral cross sections for transitions involving states H-2(v = 0, j = 0-12), H-2(v = 1, j = 0-8), and H-2(v = 2, j = 0-3) are obtained for collision energies within a range of E-min = 10(-5) eV and E-max = 2 eV. Rate constants are then calculated between T = 5 K and 3000 K, and they are compared, when possible, with previous values reported in the literature. As a first application, the cooling rate coefficient of H-2 excited by protons is determined and compared with a recent estimate.

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