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Mielke SL, Garrett BC, Fleming DG, Truhlar DG. Zero-point energy, tunnelling, and vibrational adiabaticity in the Mu + H2reaction. Mol Phys 2014. [DOI: 10.1080/00268976.2014.951416] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Aldegunde J, Jambrina P, García E, Herrero V, Sáez-Rábanos V, Aoiz F. Understanding the reaction between muonium atoms and hydrogen molecules: zero point energy, tunnelling, and vibrational adiabaticity. Mol Phys 2013. [DOI: 10.1080/00268976.2013.815399] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jambrina PG, García E, Herrero VJ, Sáez-Rábanos V, Aoiz FJ. Dynamics of the reactions of muonium and deuterium atoms with vibrationally excited hydrogen molecules: tunneling and vibrational adiabaticity. Phys Chem Chem Phys 2012; 14:14596-604. [PMID: 23019575 DOI: 10.1039/c2cp42130e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum mechanical (QM) and quasiclassical trajectory (QCT) calculations have been carried out for the exchange reactions of D and Mu (Mu = muonium) with hydrogen molecules in their ground and first vibrational states. In all the cases considered, the QM rate coefficients, k(T), are in very good agreement with the available experimental results. In particular, QM calculations on the most accurate potential energy surfaces (PESs) predict a rate coefficient for the Mu + H(2) (ν = 1) reaction which is very close to the preliminary estimate of its experimental value at 300 K. In contrast to the D + H(2) (ν = 0,1) and the Mu + H(2) (ν = 0) reactions, the QCT calculations for Mu + H(2) (ν = 1) predict a much smaller k(T) than that obtained with the accurate QM method. This behaviour is indicative of tunneling. The QM reaction probabilities and total reactive cross sections show that the total energy thresholds for the reactions of Mu with H(2) in ν = 0 and ν = 1 are very similar, whereas for the corresponding reaction with D the ν = 0 total energy threshold is about 0.3 eV lower than that for ν = 1. The results just mentioned can be explained by considering the vibrational adiabatic potentials along the minimum energy path. The threshold for the reaction of Mu with H(2) in both ν = 0 and ν = 1 states is the same and is given by the height of the ground vibrational adiabatic collinear potential, whereas for the D + H(2) reaction the adiabaticity is preserved and the threshold for the reaction in ν = 1 is very close to the height of the ν = 1 adiabatic collinear barrier. For Mu + H(2) (ν = 1) the reaction takes place by crossing from the ν = 1 to the ν = 0 adiabat, since the exit channel leading to MuH (ν = 1) is not energetically accessible. At the lowest possible energies, the non-adiabatic vibrational crossing implies a strong tunneling effect through the ν = 1 adiabatic barrier. Absence of tunneling in the classical calculations results in a threshold that coincides with the height of the ν = 1 adiabatic barrier. Most interestingly, the expected tunneling effect in the reaction of Mu with hydrogen molecules occurs for H(2) (ν = 1) but not for H(2) (ν = 0) where zero-point-energy effects clearly dominate.
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Affiliation(s)
- P G Jambrina
- Departamento de Química Física, Facultad de Química, Universidad Complutense (Unidad Asociada CSIC), 28040 Madrid, Spain
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Fleming DG, Arseneau DJ, Sukhorukov O, Brewer JH, Mielke SL, Truhlar DG, Schatz GC, Garrett BC, Peterson KA. Kinetics of the reaction of the heaviest hydrogen atom with H2, the4Heμ + H2→4HeμH + H reaction: Experiments, accurate quantal calculations, and variational transition state theory, including kinetic isotope effects for a factor of 36.1 in isotopic mass. J Chem Phys 2011; 135:184310. [DOI: 10.1063/1.3657440] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Greaves SJ, Murdock D, Wrede E, Althorpe SC. New, unexpected, and dominant mechanisms in the hydrogen exchange reaction. J Chem Phys 2008; 128:164306. [DOI: 10.1063/1.2902972] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Aoiz * FJ, BaÑares L, Herrero VJ. The H+H2reactive system. Progress in the study of the dynamics of the simplest reaction. INT REV PHYS CHEM 2005. [DOI: 10.1080/01442350500195659] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Pomerantz AE, Ausfelder F, Zare RN, Juanes-Marcos JC, Althorpe SC, Sáez Rábanos V, Aoiz FJ, Bañares L, Castillo JF. Rovibrational product state distribution for inelastic H+D2 collisions. J Chem Phys 2004; 121:6587-90. [PMID: 15473712 DOI: 10.1063/1.1804940] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Experimental measurements of rovibrational product state distributions for the inelastic scattering process H + D2(nu=0,j)-->H + D2(nu' = 1,2,j') are presented and compared with the results of quasiclassical and quantum mechanical calculations. Agreement between theory and experiment is almost quantitative. Two subtle trends are found: the relative amount of energy in product rotational excitation decreases slightly with increasing collision energy and increases slightly with increasing product vibrational excitation. These trends are the reverse of what has been found for reactive scattering in which the opposite trends are much more pronounced.
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Affiliation(s)
- Andrew E Pomerantz
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA
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Pomerantz AE, Ausfelder F, Zare RN, Althorpe SC, Aoiz FJ, Banares L, Castillo JF. Disagreement between theory and experiment in the simplest chemical reaction: Collision energy dependent rotational distributions for H+D2→HD(ν′=3,j′)+D. J Chem Phys 2004; 120:3244-54. [PMID: 15268478 DOI: 10.1063/1.1641008] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present experimental rotational distributions for the reaction H + D2 --> HD(nu' = 3,j') + D at eight different collision energies between 1.49 and 1.85 eV. We combine a previous measurement of the state-resolved excitation function for this reaction [Ayers et al., J. Chem. Phys. 119, 4662 (2003)] with the current data to produce a map of the relative reactive cross section as a function of both collision energy and rotational quantum number (an E-j' plot). To compare with the experimental data, we also present E-j' plots resulting from both time-dependent and time-independent quantum mechanical calculations carried out on the BKMP2 surface. The two calculations agree well with each other, but they produce rotational distributions significantly colder than the experiment, with the difference being more pronounced at higher collision energies. Disagreement between theory and experiment might be regarded as surprising considering the simplicity of this system; potential causes of this discrepancy are discussed.
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Affiliation(s)
- Andrew E Pomerantz
- Department of Chemistry, Stanford University, Stanford, California 94305-5080 USA
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Ayers JD, Pomerantz AE, Fernández-Alonso F, Ausfelder F, Bean BD, Zare RN. Measurement of the cross section for H+D2→HD(v′=3,j′=0)+D as a function of angle and energy. J Chem Phys 2003. [DOI: 10.1063/1.1595092] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Halász G, Vibók Á, Mebel AM, Baer M. A survey ofab initioconical intersections for the H+H2 system. J Chem Phys 2003. [DOI: 10.1063/1.1536925] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chao SD, Harich SA, Xu Dai D, Wang CC, Yang X, Skodje RT. A fully state- and angle-resolved study of the H+HD→D+H2 reaction: Comparison of a molecular beam experiment to ab initio quantum reaction dynamics. J Chem Phys 2002. [DOI: 10.1063/1.1504083] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
Recent studies of state-resolved angular distributions show the participation of reactive scattering resonances in the simplest chemical reaction. This review is intended for those who wish to learn about the state-of-the-art in the study of the H + H2 reaction family that has made this breakthrough possible. This review is also intended for those who wish to gain insight into the nature of reactive scattering resonances. Following a tour across several fields of physics and chemistry where the concept of resonance has been crucial for the understanding of new phenomena, we offer an operational definition and taxonomy of reactive scattering resonances. We introduce simple intuitive models to illustrate each resonance type. We focus next on the last decade of H + H2 reaction dynamics. Emphasis is placed on the various experimental approaches that have been applied to the search for resonance behavior in the H + H2 reaction family. We conclude by sketching the road ahead in the study of H + H2 reactive scattering resonances.
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Affiliation(s)
- Félix Fernández-Alonso
- Istituto di Struttura della Materia-Consiglio Nazionale delle Ricerche, Area della Ricerca di Roma-Tor Vergata, 00133 Rome, Italy.
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Abstract
▪ Abstract This article reviews recent progress in our understanding of gas-phase neutral reaction dynamics as made possible by improvements in the crossed molecular beam scattering technique for measuring reactive differential cross sections. A selection of crossed-beam studies on systems that play a fundamental role in our basic understanding of reaction phenomena are discussed to illustrate the capabilities of the experimental method. The examples include benchmark atom-diatom abstraction and insertion reactions, and four-atom radical reactions for which state-to-state, state-resolved, or state-averaged differential cross sections have recently been measured. The results are discussed in the light of the latest related theoretical developments regarding the treatment of potential energy surfaces and the dynamics of the systems. Recent results on crossed-beam studies of chemically relevant reactions of carbon, nitrogen, and oxygen atoms are also reviewed, and the latest developments in the technique are noted.
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Affiliation(s)
- P Casavecchia
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy.
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Kleinekathöfer U, Tang KT, Toennies JP, Yiu CL. The generalized Heitler–London theory for the H3 potential energy surface. J Chem Phys 1999. [DOI: 10.1063/1.479621] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Fernández-Alonso F, Bean BD, Zare RN. Differential cross sections for H+D2→HD (v′=2, J′=0,3,5)+D at 1.55 eV. J Chem Phys 1999. [DOI: 10.1063/1.479527] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Fernández-Alonso F, Bean BD, Zare RN. Differential cross sections for H+D2→HD(v′=1, J′=1,5,8)+D at 1.7 eV. J Chem Phys 1999. [DOI: 10.1063/1.479191] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mahapatra S, Köppel H. Semiclassical approach to the Rydberg emission spectra of H3 and its isotopomers. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00474-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jäckle A, Heitz MC, Meyer HD. Reaction cross sections for the H+D2(ν=0,1) system for collision energies up to 2.5 eV: A multiconfiguration time-dependent Hartree wave-packet propagation study. J Chem Phys 1999. [DOI: 10.1063/1.478099] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hand MR, Rodriquez CF, Williams IH, Balint-Kurti GG. Theoretical Estimation of the Activation Energy for the Reaction HO• + H2O → H2O + •OH: Importance of Tunneling. J Phys Chem A 1998. [DOI: 10.1021/jp980838x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael R. Hand
- Department of Chemistry, University of Bath, Bath BA2 7AY, U.K
| | | | - Ian H. Williams
- Department of Chemistry, University of Bath, Bath BA2 7AY, U.K
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de Miranda MP, Clary DC, Castillo JF, Manolopoulos DE. Using quantum rotational polarization moments to describe the stereodynamics of the H+D2(v=0,j=0)→HD(v′,j′)+D reaction. J Chem Phys 1998. [DOI: 10.1063/1.476369] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Brownsword RA, Hillenkamp M, Laurent T, Volpp HR, Wolfrum J, Vatsa RK, Yoo HS. Excitation Function and Reaction Threshold Studies of Isotope Exchange Reactions: H + D2 → D + HD and H + D2O → D + HOD. J Phys Chem A 1997. [DOI: 10.1021/jp970816v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard A. Brownsword
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Matthias Hillenkamp
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Thomas Laurent
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Hans-Robert Volpp
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Jürgen Wolfrum
- Physikalisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Rajesh K. Vatsa
- Chemistry Division, Bhabha Atomic Research Centre, Bombay 400-085, India
| | - Hee-Soo Yoo
- Department of Chemistry, Chungbuk National University, Cheongju 361-763, Korea
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Wrede E, Schnieder L, Welge KH, Aoiz FJ, Bañares L, Herrero VJ, Martínez-Haya B, Sáez Rábanos V. The H+D2 reaction in the vicinity of the conical intersection. J Chem Phys 1997. [DOI: 10.1063/1.473745] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Aoiz FJ, Bañares L, Díez-Rojo T, Herrero VJ, Sáez Rábanos V. Reaction Cross Section and Rate Constant Calculations for the D + H2(v=0,1) → HD + H Reaction on Three ab Initio Potential Energy Surfaces. A Quasiclassical Trajectory Study. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp9527822] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. J. Aoiz
- Departamento de Química Física, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain
| | - L. Bañares
- Departamento de Química Física, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain
| | - T. Díez-Rojo
- Departamento de Química Física, Facultad de Química, Universidad Complutense, 28040 Madrid, Spain
| | - V. J. Herrero
- Instituto de Estructura de la Materia (CSIC), Serrano 123, 28006 Madrid, Spain
| | - V. Sáez Rábanos
- Departamento de Química General y Bioquímica, ETS Ingenieros de Montes, Universidad Politécnica, 28040 Madrid, Spain
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Schnieder L, Seekamp-Rahn K, Borkowski J, Wrede E, Welge KH, Aoiz FJ, Bañiares L, D'Mello MJ, Herrero VJ, Rábanos VS, Wyatt RE. Experimental Studies and Theoretical Predictions for the H + D2 rarr > HD + D Reaction. Science 1995; 269:207-10. [PMID: 17789848 DOI: 10.1126/science.269.5221.207] [Citation(s) in RCA: 156] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The H + H(2) exchange reaction constitutes an excellent benchmark with which to test dynamical theories against experiments. The H + D(2) (vibrational quantum number v = 0, rotational quantum number j = 0) reaction has been studied in crossed molecular beams at a collision energy of 1.28 electron volts, with the use of the technique of Rydberg atom time-of-flight spectroscopy. The experimental resolution achieved permits the determination of fully rovibrational state-resolved differential cross sections. The high-resolution data allow a detailed assessment of the applicability and quality of quasi-classical trajectory (QCT) and quantum mechanical (QM) calculations. The experimental results are in excellent agreement with the QM results and in slightly worse agreement with the QCT results. This theoretical reproduction of the experimental data was achieved without explicit consideration of geometric phase effects.
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Faubel M, Martínez-Haya B, Rusin L, Tappe U, Toennies J. A scattering study of the dependence of the F + D2(ji = 0, 1, 2) → DF(νf,jf) + D reaction on the initial rotational state. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(94)01337-u] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Aoiz FJ, Bañares L, D’Mello MJ, Herrero VJ, Rábanos VS, Schnieder L, Wyatt RE. Quantum mechanical and quasiclassical calculations for the H+D2→HD+D reaction: Reaction probabilities and differential cross sections. J Chem Phys 1994. [DOI: 10.1063/1.467362] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Faubel M, Rusin L, Schlemmer S, Sondermann F, Tappe U, Toennies JP. A high resolution crossed molecular beam investigation of the absolute cross sections and product rotational states for the reaction F+D2(vi=0;ji=0,1)→DF(vf;jf)+D. J Chem Phys 1994. [DOI: 10.1063/1.467718] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Aoiz FJ, Buchenau HK, Herrero VJ, Rábanos VS. The D+H2(v=1,j)→HD(v’,j’)+H reaction. A detailed quasiclassical trajectory study. J Chem Phys 1994. [DOI: 10.1063/1.466473] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mandy ME, Martin PG, Keogh WJ. Why quasiclassical cross sections can be rotationally and vibrationally hot. J Chem Phys 1994. [DOI: 10.1063/1.466461] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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Sadeghi R, Skodje RT. Spectral quantization of high energy transition state resonances in the H+H2reaction. J Chem Phys 1993. [DOI: 10.1063/1.466014] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rubahn HG, Sathyamurthy N. Quasiclassical trajectory study of Li2(v⩽ 25,j⩽ 100)-Na exchange reaction. Mol Phys 1993. [DOI: 10.1080/00268979300100681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Arnold J, Bouché T, Dreier T, Wichmann J, Wolfrum J. CARS studies on the heterogenous relaxation of vibrationally excited hydrogen and deuterium. Chem Phys Lett 1993. [DOI: 10.1016/0009-2614(93)85402-a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Aoiz FJ, Herrero VJ, Sáez Rábanos V. Quasiclassical state to state reaction cross sections for D+H2(v=0, j=0)→HD(v’,j’)+H. Formation and characteristics of short‐lived collision complexes. J Chem Phys 1992. [DOI: 10.1063/1.463514] [Citation(s) in RCA: 152] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Adelman DE, Shafer NE, Kliner DAV, Zare RN. Measurement of relative state‐to‐state rate constants for the reaction D+H2(v, j)→HD(v’, j’)+H. J Chem Phys 1992. [DOI: 10.1063/1.463504] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Aoiz F, Herrero V, Puentedura O, Sáez Rábanos V. State-resolved differential cross sections for the H+D2 (v=0, j) → HD(v′, j′)+D reaction from quasiclassical trajectory calculations. Chem Phys Lett 1992. [DOI: 10.1016/0009-2614(92)85059-j] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Neuhauser D, Judson RS, Kouri DJ, Adelman DE, Shafer NE, Kliner DA, Zare RN. State-to-State Rates for the D + H2(v = 1, j = 1) rarr HD(v', j') + H Reaction: Predictions and Measurements. Science 1992; 257:519-22. [PMID: 17778685 DOI: 10.1126/science.257.5069.519] [Citation(s) in RCA: 110] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
A fully quantal wavepacket approach to reactive scattering in which the best available H(3) potential energy surface was used enabled a comparison with experimentally determined rates for the D + H(2)(v = 1, j = 1) --> HD(v' = 0, 1, 2; j') + H reaction at significantly higher total energies (1.4 to 2.25 electron volts) than previously possible. The theoretical results are obtained over a sufficient range of conditions that a detailed simulation of the experiment was possible, thus making this a definitive comparison of experiment and theory. Good to excellent agreement is found for the vibrational branching ratios and for the rotational distributions within each product vibrational level. However, the calculated rotational distributions are slightly hotter than the experimentally measured ones. This small discrepancy is more marked for products for which a larger fraction of the total energy appears in translation. The most likely explanation for this behavior is that refinements are needed in the potential energy surface.
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Aoiz FJ, Herrero VJ, Sáez Rábanos V. Classical collision complexes in the D+H2(v=0, j=0)→HD(v’, j’)+H reaction. J Chem Phys 1991. [DOI: 10.1063/1.461350] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kliner DAV, Adelman DE, Zare RN. Comparison of experimental and theoretical integral cross sections for D+H2(v=1, j=1)→HD(v’=1, j’)+H. J Chem Phys 1991. [DOI: 10.1063/1.461016] [Citation(s) in RCA: 90] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Aoiz FJ, Herrero VJ, Sáez Rábanos V. Effects of translational, rotational, and vibrational energy on the dynamics of the D+H2 exchange reaction. A classical trajectory study. J Chem Phys 1991. [DOI: 10.1063/1.460133] [Citation(s) in RCA: 60] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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