Swift cluster-atom collisions: experiment and model calculations

Autor:	Alain Brunelle, J.P. Rozet, K. Wohrer, Michèle Pautrat, M. Chabot, M. Nectoux, Dominique Vernhet, D. Jacquet, Y. Le Beyec, S. Della Negra, P. Attal, D. Gardes, Gilles Maynard
Rok vydání:	1996
Předmět:	Physics Formalism (philosophy of mathematics) Projectile Ionization Atom Physics::Atomic and Molecular Clusters Physics::Atomic Physics Atomic physics Impact parameter Condensed Matter Physics Collision Atomic and Molecular Physics and Optics
Zdroj:	Journal of Physics B: Atomic, Molecular and Optical Physics. 29:L755-L761
ISSN:	1361-6455 0953-4075
Popis:	Single, double and triple ionization cross sections of 10 MeV projectiles colliding with He atoms have been measured. This was achieved thanks to a new experimental set-up allowing for a complete collection and unambiguous identification (in particular with respect to their charge) of all the fragments emitted by the dissociative species (Q = 2, 3, 4). As a first attempt to understand the mechanisms of ionization in the cluster we use these results, together with those we obtained in the identical velocity 2 MeV system, for testing the predictions of an {independent atoms} - atom collision calculation within the impact parameter formalism and using the independent-electron approximation. The model is found to be surprisingly good in predicting the cluster - atom results when appropriate (i.e. able to reproduce the atom - atom case) impact parameter dependent ionization probabilities are used.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f1476f10da0650de89fd4201033fbcf5 https://doi.org/10.1088/0953-4075/29/20/006 Zobrazit plný text záznamu