Cluster–cluster fusion

Eleanor E.B. Campbell; Alexi V. Glotov; Andreas Lassesson; Raphael D. Levine

doi:10.1016/S1631-0705(02)01323-3

Agrégats comme précurseurs des nano-objets/Clusters as precursors of nano-objects

Cluster–cluster fusion
[Fusion agrégats–agrégats]

Eleanor E.B. Campbell ¹ ; Alexi V. Glotov ¹ ; Andreas Lassesson ¹ ; Raphael D. Levine ²

¹ School of Physics and Engineering Physics, Gothenburg University & Chalmers University of Technology, 41296 Gothenburg, Sweden
² The Fritz Haber Research Center for Molecular Dynamics, The Hebrew University, Jerusalem 91904, Israel

Comptes Rendus. Physique, Volume 3 (2002) no. 3, pp. 341-352.

Résumé
Abstract

Dans cet article on présente une étude expérimentale de la fusion moléculaire lors des collisions fullerene–fullerene. L'interprétation théorique de la section efficace est reconsidérée en terme d'arguments basés sur l'espace des phases et la compétition avec la dissociation directement induite par la collision. La forme et la valeur absolue de la section efficace pour les collisions C⁺₆₀+C₇₀ (ou C⁺₇₀+C₆₀) et C⁺₇₀+C₇₀ sont bien comprises mais la valeur bien plus faible de la section efficace trouvée pour la collision C⁺₆₀+C₆₀ reste intriguante. Le comportement vis à vis de la fragmentation du produit de la fusion « chaude » est bien décrit dans le cadre d'un modèle d'entropie maximum montrant l'équipartition de l'énergie dans le centre de masse, puis la fragmentation statistique.

An experimental study of molecular fusion in fullerene–fullerene collisions is presented and the theoretical interpretation of the cross section is reconsidered in terms of phase space arguments and competition with direct collision induced dissociation. The form and absolute magnitude of the cross sections for C⁺₆₀+C₇₀ (or C⁺₇₀+C₆₀) and C⁺₇₀+C₇₀ can be understood, however, the much smaller cross section for C⁺₆₀+C₆₀ remains a puzzle. The fragmentation behaviour of the hot fusion product is well described by a maximal entropy model indicating equipartition of the centre of mass collision energy followed by statistical fragmentation.

Reçu le : 2002-02-03
Accepté le : 2002-03-15
Publié le : 2002-04-01

DOI : 10.1016/S1631-0705(02)01323-3

Keywords: fullerene–fullerene collision, fragmentation
Mots-clés : collision fullerene–fullerene, fragmentation

Affiliations des auteurs :

Eleanor E.B. Campbell ¹ ; Alexi V. Glotov ¹ ; Andreas Lassesson ¹ ; Raphael D. Levine ²

¹ School of Physics and Engineering Physics, Gothenburg University & Chalmers University of Technology, 41296 Gothenburg, Sweden
² The Fritz Haber Research Center for Molecular Dynamics, The Hebrew University, Jerusalem 91904, Israel

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     doi = {10.1016/S1631-0705(02)01323-3},
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Eleanor E.B. Campbell; Alexi V. Glotov; Andreas Lassesson; Raphael D. Levine. Cluster–cluster fusion. Comptes Rendus. Physique, Volume 3 (2002) no. 3, pp. 341-352. doi : 10.1016/S1631-0705(02)01323-3. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(02)01323-3/

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Григорий Н. Макаров Экстремальные процессы в кластерах при столкновении с твердой поверхностью, Uspekhi Fizicheskih Nauk, Volume 176 (2006) no. 2, p. 121 | DOI:10.3367/ufnr.0176.200602a.0121
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