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Hróðmarsson HR, Kvaran Á. Revealing photofragmentation dynamics through interactions between Rydberg states: REMPI of HI as a case study. Phys Chem Chem Phys 2015; 17:32517-27. [PMID: 26593395 DOI: 10.1039/c5cp06185g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High energy regions of molecular electronic states are largely characterized by the nature and involvement of Rydberg states. Whereas there are a number of observed dynamical processes that are due to interactions between Rydberg and valence states, reports on the corresponding effect of Rydberg-Rydberg state interaction in the literature are scarce. Here we report a detailed characterization of the effects of interactions between two Rydberg states on photofragmentation processes, for a hydrogen halide molecule. Perturbation effects, showing as rotational line shifts, intensity alterations and line-broadenings in REMPI spectra of HI, for two-photon resonance excitations to the j(3)Σ(-)(0(+); v' = 0) and k(3)Π1(v' = 2) Rydberg states, are analyzed. The data reveal pathways of further photofragmentation processes involving photodissociation, autoionization and photoionization affected by the Rydberg-Rydberg state interactions as well as the involvement of other states, close in energy. Detailed mechanisms of the involved processes are proposed.
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Affiliation(s)
| | - Ágúst Kvaran
- Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavík, Iceland.
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Vidma KV, Parker DH, Bogdanchikov GA, Baklanov AV, Kochubei SA. Ionic Pathways following UV Photoexcitation of the (HI)2 van der Waals Dimer. J Phys Chem A 2009; 114:3067-73. [DOI: 10.1021/jp9067679] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Konstantin V. Vidma
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Institute of Chemical Kinetics and Combustion, Institutskaya Street 3, Novosibirsk 630090 Russia, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia, and Institute of Semiconductor Physics, Academician Lavrentiev Ave. 13, Novosibirsk 630090, Russia
| | - David H. Parker
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Institute of Chemical Kinetics and Combustion, Institutskaya Street 3, Novosibirsk 630090 Russia, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia, and Institute of Semiconductor Physics, Academician Lavrentiev Ave. 13, Novosibirsk 630090, Russia
| | - Georgii A. Bogdanchikov
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Institute of Chemical Kinetics and Combustion, Institutskaya Street 3, Novosibirsk 630090 Russia, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia, and Institute of Semiconductor Physics, Academician Lavrentiev Ave. 13, Novosibirsk 630090, Russia
| | - Alexey V. Baklanov
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Institute of Chemical Kinetics and Combustion, Institutskaya Street 3, Novosibirsk 630090 Russia, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia, and Institute of Semiconductor Physics, Academician Lavrentiev Ave. 13, Novosibirsk 630090, Russia
| | - Sergei A. Kochubei
- Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 ED Nijmegen, The Netherlands, Institute of Chemical Kinetics and Combustion, Institutskaya Street 3, Novosibirsk 630090 Russia, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia, and Institute of Semiconductor Physics, Academician Lavrentiev Ave. 13, Novosibirsk 630090, Russia
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Hirata S, Yanai T, Harrison RJ, Kamiya M, Fan PD. High-order electron-correlation methods with scalar relativistic and spin-orbit corrections. J Chem Phys 2007; 126:024104. [PMID: 17228940 DOI: 10.1063/1.2423005] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
An assortment of computer-generated, parallel-executable programs of ab initio electron-correlation methods has been fitted with the ability to use relativistic reference wave functions. This has been done on the basis of scalar relativistic and spin-orbit effective potentials and by allowing the computer-generated programs to handle complex-valued, spinless orbitals determined by these potentials. The electron-correlation methods that benefit from this extension are high-order coupled-cluster methods (up to quadruple excitation operators) for closed- and open-shell species, coupled-cluster methods for excited and ionized states (up to quadruples), second-order perturbation corrections to coupled-cluster methods (up to triples), high-order perturbation corrections to configuration-interaction singles, and active-space (multireference) coupled-cluster methods for the ground, excited, and ionized states (up to active-space quadruples). A subset of these methods is used jointly such that the dynamical correlation energies and scalar relativistic effects are computed by a lower-order electron-correlation method with more extensive basis sets and all-electron relativistic treatment, whereas the nondynamical correlation energies and spin-orbit effects are treated by a higher-order electron-correlation method with smaller basis sets and relativistic effective potentials. The authors demonstrate the utility and efficiency of this composite scheme in chemical simulation wherein the consideration of spin-orbit effects is essential: ionization energies of rare gases, spectroscopic constants of protonated rare gases, and photoelectron spectra of hydrogen halides.
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Affiliation(s)
- So Hirata
- Quantum Theory Project, Department of Chemistry, University of Florida, Gainesville, Florida 32611-8435, USA.
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Hikosaka Y, Mitsuke K. Autoionization and neutral dissociation of superexcited HI studied by two-dimensional photoelectron spectroscopy. J Chem Phys 2004; 121:792-9. [PMID: 15260607 DOI: 10.1063/1.1758212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Two-dimensional photoelectron spectroscopy of hydrogen iodide (HI) has been performed in the photon energy region of 11.10-14.85 eV, in order to investigate dynamical properties on autoionization and neutral dissociation of Rydberg states HI*(RA) converging to HI+(A 2Sigma1/2(+)). A two-dimensional photoelectron spectrum exhibits strong vibrational excitation of HI+(X 2Pi) over a photon energy region from approximately 12 to 13.7 eV, which is attributable to the autoionizing feature of the 5 dpi HI*(RA) state. A noticeable set of stripes in the photon energy region of 13.5-14.5 eV is assigned as resulting from autoionization of the atomic Rydberg states of I* converging to I+ (3P0 or 3P1). The formation of I* is understood in terms of predissociation of multiple HI*(RA) states by way of the repulsive Rydberg potential curves converging to HI+(4Pi1/2).
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Affiliation(s)
- Yasumasa Hikosaka
- UVSOR Facility, Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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Yencha AJ, Baltzer P, Cormack AJ, Li Y, Liebermann HP, Alekseyev AB, Buenker RJ. High-resolution photoelectron spectroscopy of HI and DI: Experimental and theoretical analysis of the A 2Σ+ ion system. J Chem Phys 2003. [DOI: 10.1063/1.1603735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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