Modélisation classique de champs de forces d’interactions additives dans les agrégats de type X+ Arn, (X = Li et K); mécanisme de croissance

Author:

Salem F Ben,Taarit F,Hadj Rhouma M Ben El,Lakhdar Z Ben

Abstract

The structure and stability of the Li+Arn and K+Arn clusters are studied using pair additive potentials adapted to reproduce the ab initio calculations that we estimate as the most accurate for the Li+Ar, K+Ar, and Ar–Ar dimers. The exploration of the potential energy surfaces of the Li+Arn and K+Arn systems was carried out with Wales’ method, which includes Monte-Carlo and deformation methods. From a structural point of view, one identifies a construction mechanism in very good agreement with the interpretation of the mass spectrum done by Velegrakis, including a difference for the n = 10 case. The study of the relative stability of these structures yields magic numbers for n = 8, 10, 14, 16, 18, 20, 22, 30, 32, and 34, which are in good agreement with the experiment. [Journal translation]

Publisher

Canadian Science Publishing

Subject

General Physics and Astronomy

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