Intensity and detuning dependence of fine structure changing collisions in a
85
Rb magneto-optical trap |
| |
Authors: | MW Mancini AL de Oliveira KMF Magalhãaes VS Bagnato LG Marcassa |
| |
Institution: | (1) Département de Recherche Fondamentale sur la Matière Condensée, GIM, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France, FR |
| |
Abstract: | In an experimental study, the multi-ionisation of metallic clusters (Nan) has been analysed in collisions with light ions in low charge states (H+, He+, He2+, O3+) at collision velocities below 1 a.u. Cluster ions are produced in charge states up to 5+. The average charge of the nano-particles
is found to increase linearly with the variation of projectile velocity and the square of the effective projectile charge,
well in agreement with the electronic stopping power of the bulk material. A fraction of 50% to 30% of the total projectile
energy loss (decreasing with velocity) is transferred into vibrational modes in good agreement with recent theoretical predictions.
Received 8 November 2000 and Received in final form 26 January 2001 |
| |
Keywords: | PACS 36 40 Wa Charged clusters – 34 50 Bw Energy loss and stopping power |
本文献已被 SpringerLink 等数据库收录! |
|