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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2018

Quantum-tunneling isotope-exchange reaction H 2 + D − → HD + H −

Résumé

The tunneling reaction H 2 + D − → HD + H − was studied in a recent experimental work at low temperatures (10, 19, and 23 K) by Endres et al. [Phys. Rev. A 95, 022706 (2017)]. An upper limit of the rate coefficient was found to be about 10 −18 cm 3 /s. In the present study, reaction probabilities are determined using the ABC program developed by Skouteris et al. [Comput. Phys. Commun. 133, 128 (2000)]. The probabilities for ortho-H 2 and para-H 2 in their ground rovibrational states are obtained numerically at collision energies above 50 meV with the total angular momentum J = 0–15 and extrapolated below 50 meV using a WKB approach. Thermally averaged rate coefficients for ortho-and para-H 2 are obtained; the largest one, for ortho-H 2 , is about 3.1 × 10 −20 cm 3 /s, which agrees with the experimental results.
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Dates et versions

hal-01820456 , version 1 (21-06-2018)

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Chi Hong Yuen, Mehdi Ayouz, Eric S Endres, Olga Lakhamanskaya, Roland Wester, et al.. Quantum-tunneling isotope-exchange reaction H 2 + D − → HD + H −. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2018, 97 (2), pp.22705 - 22705. ⟨10.1103/PhysRevA.97.022705⟩. ⟨hal-01820456⟩
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