1
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Denis-Alpizar O, Zanchet A, Stoecklin T. Quantum study of the rovibrational relaxation of HF by collision with 4He on a new potential energy surface. Phys Chem Chem Phys 2024. [PMID: 38647242 DOI: 10.1039/d3cp05606f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The HF molecule is considered the main reservoir of fluorine in the interstellar medium (ISM). Also, the interactions of this molecule with the most common atoms and molecules in the ISM have attracted great interest from the astrochemical community. Collisions between HF and helium have recently caused controversy following a study using a two-dimensional SAPT potential energy surface (PES) that exhibited large discrepancies with previous scattering calculations based on more recent ab initio potentials. To address this issue, our current work aims to develop the most precise three-dimensional PES for the HF+He system. We employ the size-consistent CCSD(T) method in conjunction with the aug-cc-pV6Z basis set. The main features of the new PES as well as the bound states of the He-HF complex are compared to the existing data. The new PES is then utilised to conduct close coupling calculations that demonstrate He-HF as a good instance of vibration-rotation near resonant energy transfer. The novel rate coefficients will be accessible via the BASECOL database, and the use of the new PES is advised when describing HF in helium droplets.
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Affiliation(s)
- Otoniel Denis-Alpizar
- Departamento de Física, Facultad de Ciencias, Universidad de Chile, Av. Las Palmeras 3425, Ñuñoa, Santiago, Chile.
| | - Alexandre Zanchet
- Instituto de Fsica Fundamental, CSIC, Serrano 123, 28006, Madrid, Spain.
| | - Thierry Stoecklin
- Institut des Sciences Moleculaires, Universite de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France.
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2
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Garcia-Vasquez RM, Cabrera-Gonzalez LD, Denis-Alpizar O, Stoecklin T. A rigid bender study of the bending relaxation H2O and D2O by collisions with Ar. Chemphyschem 2024:e202300752. [PMID: 38236071 DOI: 10.1002/cphc.202300752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 01/18/2024] [Accepted: 01/18/2024] [Indexed: 01/19/2024]
Abstract
The bending relaxation of H2O and D2O by collisions with Ar is studied at the Close Coupling level. Two new 4D PES are developed for these two systems. They are tested by performing rigid rotor calculations as well as computing the D2O-Ar bound states. The results are compared with available theoretical and experimental data. Propensity rules for the dynamics are discussed and compared to those of H2O colliding with Ne or He. The bending relaxation cross sections and rates are then calculated for these two systems. The results are analysed and compared with available experimental data.
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Affiliation(s)
| | | | | | - Thierry Stoecklin
- CNRS: Centre National de la Recherche Scientifique, UMR5255-CNRS, 351 cours de la libérationj, 33405, Talence, FRANCE
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3
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García-Vázquez RM, Denis-Alpizar O, Stoecklin T. A Comparative Study of the Cold Collisions of H 2O and D 2O with Ne. J Phys Chem A 2023. [PMID: 37222149 DOI: 10.1021/acs.jpca.3c02086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The present work is dedicated to the first theoretical study of the rotationally inelastic collisions of Ne with H2O and its isotopologue D2O in an attempt to analyze the effect on the dynamics of H substitution by deuterium. To this aim two new potential energy surfaces are developed. Their quality is tested by computing the bound states of the complexes and comparing them with those most recently reported by other teams. System-specific collisional propensity rules are inferred for these two systems by analyzing the computed state-to-state cross sections at low and higher collision energy. The application of the Alexander parity index propensity rule is also discussed, and the present results are compared with those obtained for the collisions with other noble gases.
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Affiliation(s)
- Ricardo Manuel García-Vázquez
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France
- Departamento de Física Atómica y Molecular, Instituto Superior de Tecnologías y Ciencias Aplicadas, Universidad de La Habana, Ave. Salvador Allende No. 1110, 10400 Plaza de la Revolución, Ciudad de La Habana, Cuba
| | - Otoniel Denis-Alpizar
- Grupo de Investigación en Física Aplicada, Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, 7500912 Santiago, Chile
| | - Thierry Stoecklin
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France
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4
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Lu D, Urzúa-Leiva R, Denis-Alpizar O, Guo H. Hyperthermal Dynamics and Kinetics of the C( 3P) + N 2(X 1Σg+) → CN(X 2Σ+) + N( 4S) Reaction. J Phys Chem A 2023; 127:2839-2845. [PMID: 36944165 DOI: 10.1021/acs.jpca.3c00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
The hyperthermal dynamics and kinetics of the title reaction, which plays an important role in hypersonic chemistry for atmospheric entry vehicles, are investigated using quasi-classical trajectory methods on a recently developed ground electronic state potential energy surface. The dynamics calculations indicated that the reaction follows a complex-forming mechanism, despite its large endoergicity. The calculated differential cross section is forward-backward symmetric, consistent with a long-lived reaction intermediate supported by the NCN potential well. The lifetime of the reaction complex is sufficiently long that the vibrational distribution of the CN product can be predicted by the phase space theory. The calculated vibrational state specific and thermal rate coefficients follow the Arrhenius behavior, and the agreement with existing low-temperature experimental thermal rate coefficients is satisfactory. Extrapolations to high temperatures relevant to hypersonic conditions are provided.
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Affiliation(s)
- Dandan Lu
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Rodrigo Urzúa-Leiva
- Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, 7500912 Santiago, Chile
| | - Otoniel Denis-Alpizar
- Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, 7500912 Santiago, Chile
| | - Hua Guo
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
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5
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Cabrera-González LD, Páez-Hernández D, Stoecklin T, Denis-Alpizar O. An explicitly correlated six-dimensional potential energy surface for the SiCSi + H 2 complex. Phys Chem Chem Phys 2023; 25:4542-4552. [PMID: 36722736 DOI: 10.1039/d2cp03872b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The first six-dimensional potential energy surface (PES) for the SiCSi + H2 complex is presented in this work. This surface is developed from a large number of ab initio energies computed at the explicitly correlated coupled-cluster level of theory together with the augmented correlation-consistent polarized valence triple zeta basis set (CCSD(T)-F12/aug-cc-pVTZ). These energies are fitted to an analytical function through a procedure that combines spline, least-squares, and kernel-based methods. Two minimums of similar depths were found at the equilibrium geometry of the SiCSi molecule. The dependence of the PES on the bending angle is analyzed. Furthermore, a reduced four-dimensional PES averaged over the H2 orientation is presented. Finally, the six-dimensional PES is used for computing the second virial coefficient of the SiCSi + H2 pair using classical and semi-classical methods.
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Affiliation(s)
- Lisán David Cabrera-González
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, República 275, Santiago, Chile
| | - Dayán Páez-Hernández
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, República 275, Santiago, Chile
| | - Thierry Stoecklin
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France
| | - Otoniel Denis-Alpizar
- Grupo de Investigación en Física Aplicada, Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, Santiago, Chile.
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Quintas-Sánchez E, Dawes R, Denis-Alpizar O. Theoretical study of the HCS+–H2 van der Waals complex: potential energy surface, rovibrational bound states, and rotationally inelastic collisional cross sections. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1980234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Richard Dawes
- Department of Chemistry, Missouri University of Science and Technology, Rolla, USA
| | - Otoniel Denis-Alpizar
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Santiago, Chile
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7
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Urzúa-Leiva R, Denis-Alpizar O. Study of the CN(X 2Σ +) + N( 4S) Reaction at High Temperatures: Potential Energy Surface and Thermal Rate Coefficients. J Phys Chem A 2021; 125:8168-8174. [PMID: 34499507 DOI: 10.1021/acs.jpca.1c04903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reactions involving C and N play an essential role in the chemistry around the surface of a hypersonic spacecraft during its atmospheric re-entry. The collision of CN with other molecules and atoms has particular interest in aerothermodynamic modeling. This work focuses on the study of the CN + N → N2 + C reaction in the triplet manifold 3A″ of CN2. A high-level full-dimensional potential energy surface for this system is developed from ab initio calculations at the MRCI-F12 + Q level of theory. This surface is employed in quasiclassical trajectory calculations, and thermal rate coefficients from 100 to 20,000 K are computed. The rates for the formation of N2 are compared with the available experimental data, and good agreement is found. At low and intermediate temperatures, the N2 formation is more efficient than the N-exchange process, while at high temperatures, the rates for both processes are comparable. Finally, analytically modified Arrhenius expressions for the reaction rates of N2 formation and N-exchange are reported.
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Affiliation(s)
- Rodrigo Urzúa-Leiva
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, 7500912 Santiago, Chile
| | - Otoniel Denis-Alpizar
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, 7500912 Santiago, Chile
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8
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Stoecklin T, Cabrera-González LD, Denis-Alpizar O, Páez-Hernández D. A close coupling study of the bending relaxation of H 2O by collision with He. J Chem Phys 2021; 154:144307. [PMID: 33858145 DOI: 10.1063/5.0047718] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a close coupling study of the bending relaxation of H2O by collision with He, taking explicitly into account the bending-rotation coupling within the rigid-bender close-coupling method. A 4D potential energy surface is developed based on a large grid of ab initio points calculated at the coupled-cluster single double triple level of theory. The bound states energies of the He-H2O complex are computed and found to be in excellent agreement with previous theoretical calculations. The dynamics results also compare very well with the rigid-rotor results available in the Basecol database and with experimental data for both rotational transitions and bending relaxation. The bending-rotation coupling is also demonstrated to be very efficient in increasing bending relaxation when the rotational excitation of H2O increases.
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Affiliation(s)
- Thierry Stoecklin
- Institut des Sciences Moléculaires, Université de Bordeaux, CNRS UMR 5255, 33405 Talence Cedex, France
| | - Lisán David Cabrera-González
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, República 275, Santiago, Chile
| | - Otoniel Denis-Alpizar
- Núcleo de Astroquímica y Astrofísica, Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Av. Pedro de Valdivia 425, Providencia, Santiago, Chile
| | - Dayán Páez-Hernández
- Doctorado en Fisicoquímica Molecular, Facultad de Ciencias Exactas, Universidad Andres Bello, República 275, Santiago, Chile
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Santander C, Urzúa-Leiva R, Stoecklin T, Denis-Alpizar O. Rotational Transitions of HOC + Induced by Collision with He at Low Temperatures. J Phys Chem A 2019; 123:10990-10995. [PMID: 31795633 DOI: 10.1021/acs.jpca.9b10021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The HOC+ molecule has for long been detected in several regions of the interstellar medium (ISM). The collisional ro-vibrational rate coefficients of this molecule with the most common colliders in the ISM are then required for applying nonlocal thermal equilibrium models. However, this molecule has a low bending frequency (249 cm-1), and the use of the rigid rotor approximation is therefore limited to low collision energies. Also, the complete determination of the ro-vibrational rate coefficients of HOC+ in collision with He requires including the bending motion in the analytical model of the potential energy surface (PES) of the system. The first goal of this work is then to develop the first rigid bender four-dimensional PES for the interaction between HOC+ and He. To this aim, a large grid of ab initio energies are computed at the CCSD(T)-F12b/aug-cc-pVQZ level of theory and an analytical representation of the PES is obtained using a combination of least square and reproducing kernel Hilbert space procedures. The global minimum of this PES is found to be reached for a linear configuration of the complex. In the second part of this study, rigid rotor close-coupling calculations are performed at low collision energy, and the calculated rate coefficients are compared to those previously determined for the collisions of He with its HCO+ isomer.
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Affiliation(s)
- Carlos Santander
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería , Universidad Autónoma de Chile , Av. Pedro de Valdivia 425 , 7500912 Providencia , Santiago , Chile
| | - Rodrigo Urzúa-Leiva
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería , Universidad Autónoma de Chile , Av. Pedro de Valdivia 425 , 7500912 Providencia , Santiago , Chile
| | - Thierry Stoecklin
- Institut des Sciences Moléculaires , Université de Bordeaux, CNRS UMR 5255 , 33405 Talence Cedex , France
| | - Otoniel Denis-Alpizar
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería , Universidad Autónoma de Chile , Av. Pedro de Valdivia 425 , 7500912 Providencia , Santiago , Chile
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Stoecklin T, Denis-Alpizar O, Clergerie A, Halvick P, Faure A, Scribano Y. Rigid-Bender Close-Coupling Treatment of the Inelastic Collisions of H2O with para-H2. J Phys Chem A 2019; 123:5704-5712. [DOI: 10.1021/acs.jpca.9b04052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thierry Stoecklin
- UMR5255-CNRS, Université de Bordeaux, 351 cours de la libération, F-33405 Talence, France
| | - Otoniel Denis-Alpizar
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, El Llano Subercaseaux 2801, San Miguel, Santiago, Chile
| | - Alexandre Clergerie
- UMR5255-CNRS, Université de Bordeaux, 351 cours de la libération, F-33405 Talence, France
| | - Philippe Halvick
- UMR5255-CNRS, Université de Bordeaux, 351 cours de la libération, F-33405 Talence, France
| | - Alexandre Faure
- CNRS, IPAG, Université Grenoble Alpes, F-38000 Grenoble, France
| | - Yohann Scribano
- Laboratoire Univers et Particules de Montpellier, UMR-CNRS 5299, Université de Montpellier, F-34095 Montpellier Cedex, France
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Denis-Alpizar O, Bemish RJ, Meuwly M. Communication: Vibrational relaxation of CO(1Σ) in collision with Ar(1S) at temperatures relevant to the hypersonic flight regime. J Chem Phys 2017; 146:111102. [DOI: 10.1063/1.4978498] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Otoniel Denis-Alpizar
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Raymond J. Bemish
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, New Mexico 87117, USA
| | - Markus Meuwly
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
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12
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Denis-Alpizar O, Bemish RJ, Meuwly M. Reactive collisions for NO(2Π) + N(4S) at temperatures relevant to the hypersonic flight regime. Phys Chem Chem Phys 2017; 19:2392-2401. [DOI: 10.1039/c6cp07142b] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rate coefficients for the NO(2Π) + N(4S) reaction at high temperatures from quasiclassical trajectories using MRCI+Q PESs of the lowest triplet states.
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Affiliation(s)
- Otoniel Denis-Alpizar
- Department of Chemistry
- University of Basel
- Klingelbergstrasse 80
- CH-4056 Basel
- Switzerland
| | - Raymond J. Bemish
- Air Force Research Laboratory
- Space Vehicles Directorate
- Kirtland AFB
- USA
| | - Markus Meuwly
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
- Department of Chemistry
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13
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Denis-Alpizar O, Unke OT, Bemish RJ, Meuwly M. Quantum and quasiclassical trajectory studies of rotational relaxation in Ar–N2+ collisions. Phys Chem Chem Phys 2017; 19:27945-27951. [DOI: 10.1039/c7cp05036d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum and classical study of the Ar–N2+ collision based on a new potential energy surface.
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Affiliation(s)
- Otoniel Denis-Alpizar
- Department of Chemistry
- University of Basel
- Klingelbergstrasse 80
- CH-4056 Basel
- Switzerland
| | - Oliver T. Unke
- Department of Chemistry
- University of Basel
- Klingelbergstrasse 80
- CH-4056 Basel
- Switzerland
| | - Raymond J. Bemish
- Air Force Research Laboratory
- Space Vehicles Directorate
- New Mexico 87117
- USA
| | - Markus Meuwly
- Department of Chemistry
- University of Basel
- Klingelbergstrasse 80
- CH-4056 Basel
- Switzerland
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Al Mogren MM, Denis-Alpizar O, Abdallah DB, Stoecklin T, Halvick P, Senent ML, Hochlaf M. On the use of explicitly correlated treatment methods for the generation of accurate polyatomic –He/H2 interaction potential energy surfaces: The case of C3–He complex and generalization. J Chem Phys 2014; 141:044308. [DOI: 10.1063/1.4890729] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. M. Al Mogren
- Chemistry Department, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - O. Denis-Alpizar
- Université de Bordeaux, ISM, CNRS UMR 5255, 33405 Talence Cedex, France
- Departamento de Física, Universidad de Matanzas, Matanzas 40100, Cuba
| | - D. Ben Abdallah
- Laboratoire de Spectroscopie Atomique, Moléculaire et Applications – LSAMA Université de Tunis, Tunis, Tunisia and Department of General Studies, Riyadh Corporation of Technology, Technical and Vocational Training Corporation, P.O. Box: 42826, Riyadh 11551, Kingdom of Saudi Arabia
| | - T. Stoecklin
- Université de Bordeaux, ISM, CNRS UMR 5255, 33405 Talence Cedex, France
| | - P. Halvick
- Université de Bordeaux, ISM, CNRS UMR 5255, 33405 Talence Cedex, France
| | - M.-L. Senent
- Departamento de Química y Física Teóricas, Instituto de Estructura de la Materia, IEM-C.S.I.C., Serrano 121, Madrid 28006, Spain
| | - M. Hochlaf
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France
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15
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Denis-Alpizar O, Stoecklin T, Halvick P, Dubernet ML. Rotational relaxation of CS by collision with ortho- and para-H2 molecules. J Chem Phys 2014; 139:204304. [PMID: 24289351 DOI: 10.1063/1.4832385] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Quantum mechanical investigation of the rotationally inelastic collisions of CS with ortho- and para-H2 molecules is reported. The new global four-dimensional potential energy surface presented in our recent work is used. Close coupling scattering calculations are performed in the rigid rotor approximation for ortho- and para-H2 colliding with CS in the j = 0-15 rotational levels and for collision energies ranging from 10(-2) to 10(3) cm(-1). The cross sections and rate coefficients for selected rotational transitions of CS are compared with the ones previously reported for the collision of CS with He. The largest discrepancies are observed at low collision energy, below 1 cm(-1). Above 10 cm(-1), the approximation using the square root of the relative mass of the colliders to calculate the cross sections between a molecule and H2 from the data available with (4)He is found to be a good qualitative approximation. The rate coefficients calculated with the electron gas model for the He-CS system show more discrepancy with our accurate results. However, scaling up these rates by a factor of 2 gives a qualitative agreement.
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Vera MH, Kalugina Y, Denis-Alpizar O, Stoecklin T, Lique F. Rotational excitation of HCN by para- and ortho-H2. J Chem Phys 2014; 140:224302. [DOI: 10.1063/1.4880499] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Denis-Alpizar O, Stoecklin T, Halvick P. Rovibrational energy transfer in the He-C3 collision: Potential energy surface and bound states. J Chem Phys 2014; 140:084316. [DOI: 10.1063/1.4866839] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Denis-Alpizar O, Kalugina Y, Stoecklin T, Vera MH, Lique F. A new ab initio potential energy surface for the collisional excitation of HCN by para- and ortho-H2. J Chem Phys 2013; 139:224301. [DOI: 10.1063/1.4833676] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Stoecklin T, Denis-Alpizar O, Halvick P, Dubernet ML. Ro-vibrational relaxation of HCN in collisions with He: Rigid bender treatment of the bending-rotation interaction. J Chem Phys 2013; 139:124317. [DOI: 10.1063/1.4822296] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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Denis-Alpizar O, Stoecklin T, Halvick P, Dubernet ML. The interaction of He with vibrating HCN: Potential energy surface, bound states, and rotationally inelastic cross sections. J Chem Phys 2013; 139:034304. [DOI: 10.1063/1.4813125] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Denis-Alpizar O, Stoecklin T, Halvick P, Dubernet ML, Marinakis S. Potential energy surface and rovibrational energy levels of the H2-CS van der Waals complex. J Chem Phys 2012; 137:234301. [DOI: 10.1063/1.4771658] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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