{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,2,7]],"date-time":"2024-02-07T11:40:07Z","timestamp":1707306007187},"reference-count":55,"publisher":"AIP Publishing","issue":"22","content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2004,6,8]]},"abstract":"<jats:p>Classical trajectory calculations using the MERCURY\/VENUS code have been carried out on the H+O2 reactive system using the DMBE-IV potential energy surface. The vibrational quantum number and the temperature were selected over the ranges v=0 to 15, and T=300 to 10\u200a000 K, respectively. All other variables were averaged. Rate constants were determined for the energy transfer process, H+O2(v)\u2192H+O2(v\u2033), for the bimolecular exchange process, H+O2(v)\u2192OH(v\u2032)+O, and for the dissociative process, H+O2(v)\u2192H+O+O. The dissociative process appears to be a mere extension of the process of transferring large amounts of energy. State-to-state rate constants are given for the exchange reaction, and they are in reasonable agreement with previous results, while the energy transfer and dissociative rate constants have never been reported previously. The lifetime distributions of the HO2 complex, calculated as a function of v and temperature, were used as a basis for determining the relative contributions of various vibrational states of O2 to the thermal rate coefficients for recombination at various pressures. This novel approach, based on the complex\u2019s ability to survive until it collides in a secondary process with an inert gas, is used here for the first time. Complete falloff curves for the recombination of H+O2 are also calculated over a wide range of temperatures and pressures. The combination of the two separate studies results in pressure- and temperature-dependent rate constants for H+O2(v)(+Ar)\u21c4HO2(+Ar). It is found that, unlike the exchange reaction, vibrational and rotational\u2013translational energy are liabilities in promoting recombination.<\/jats:p>","DOI":"10.1063\/1.1712765","type":"journal-article","created":{"date-parts":[[2004,5,17]],"date-time":"2004-05-17T22:24:38Z","timestamp":1084832678000},"page":"10483-10500","update-policy":"http:\/\/dx.doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":16,"title":["Calculation of the rate constant for state-selected recombination of H+O2(v) as a function of temperature and pressure"],"prefix":"10.1063","volume":"120","author":[{"given":"Heshel","family":"Teitelbaum","sequence":"first","affiliation":[{"name":"Departamento de Quimica, Universidade de Coimbra, P-3049\u2009Coimbra Codex, Portugal"}]},{"given":"Pedro J. S. B.","family":"Caridade","sequence":"additional","affiliation":[{"name":"Departamento de Quimica, Universidade de Coimbra, P-3049\u2009Coimbra Codex, Portugal"}]},{"given":"Ant\u00f3nio J. C.","family":"Varandas","sequence":"additional","affiliation":[{"name":"Departamento de Quimica, Universidade de Coimbra, P-3049\u2009Coimbra Codex, Portugal"}]}],"member":"317","reference":[{"key":"2024020706452959700_r1","doi-asserted-by":"crossref","first-page":"181","DOI":"10.1002\/bbpc.19850890218","volume":"89","year":"1985","journal-title":"Ber. Bunsenges. Phys. Chem."},{"key":"2024020706452959700_r1a","first-page":"1258","volume":"95","year":"1991","journal-title":"J. Phys. Chem."},{"key":"2024020706452959700_r2","doi-asserted-by":"crossref","first-page":"5120","DOI":"10.1063\/1.441721","volume":"74","year":"1981","journal-title":"J. Chem. 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