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Quantum vibrational dynamics of the Ar2ICl cluster

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Abstract

Quantum mechanical multiconfiguration time-dependent Hartree (MCTDH) calculations are presented for the Ar2ICl cluster. The Hamiltonian operator is expressed in satellite coordinates, with its potential term being represented as a sum of the three-body ArICl ab initio parameterized interactions plus the Ar–Ar ones. The potential surface shows different type of low-lying minima (global and local), that influence the vibrational dynamics of the system. The vibrational ground state properties and specific vibrationally excited states are obtained from improved relaxation MCTDH calculations employing a large number of basis set functions, especially for the angular part, to achieve convergence. By analyzing the spatial density distributions of the vibrational states we are able to characterize the corresponding states to different isomers, such as tetrahedral, linear, bending type ones. The binding energy of each isomer is also computed, and they contribute to evaluate their relative stability, as well as the importance of the underlying multiple minima of the potential surface.

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Author information

Authors and Affiliations

  1. Departamento de Física, Universidad Nacional de Colombia, Calle 26, Cra 39, Edificio, 404, Bogotá, Colombia

    Álvaro Valdés

  2. Instituto de Física Fundamental (IFF-CSIC), CSIC, Serrano 123, 28006, Madrid, Spain

    Rita Prosmiti

Authors
  1. Álvaro Valdés
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  2. Rita Prosmiti
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Correspondence to Álvaro Valdés.

Additional information

Contribution to the Topical Issue “Atomic Cluster Collisions (7th International Symposium)”, edited by Gerardo Delgado Barrio, Andrey Solov’Yov, Pablo Villarreal, Rita Prosmiti.

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Valdés, Á., Prosmiti, R. Quantum vibrational dynamics of the Ar2ICl cluster. Eur. Phys. J. D 70, 51 (2016). https://doi.org/10.1140/epjd/e2016-60702-0

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