Showing papers by "Lutz Schweikhard published in 1998"
63 citations
TL;DR: In this article, structural, dynamical and electronic properties of adducts formed by adsorbing methanol onto size-selected gold clusters were investigated using infrared multiple-photon dissociation spectroscopy of trapped Au n + CH 3 OH, n ⩽15, in conjunction with Car-Parrinello calculations.
45 citations
TL;DR: In this article, collision induced dissociation was applied to study the fragmentation channels of multiply charged gold clusters, Au N2+, size N= 7 -35, and Au> N3+}, N = 19 -35.
Abstract: Collision induced dissociation is applied to study the fragmentation channels of multiply charged gold clusters, Au N2+, size N= 7 –35, and Au> N3+}, N = 19–35, stored in an ion cyclotron resonance (Penning) trap. The main dissociation pathways are neutral monomer evaporation, Au> NZ+to Au> N-1Z+} + Au, for the larger and fission into a charged trimer plus the remaining cluster, Au> NZ+to{}Au> N-3(Z-1)+} +{}Au> 3+}, for the smaller clusters. In the intermediate cluster size region an odd–even alternation of the two competing decay pathways is observed. In addition, for some specific cluster sizes there are indications of neutral dimer evaporation, Au> NZ+to{}Au> N-2Z++Au> 2}, and of extremely asymmetric fission of the form Au> NZ+to Au> N-1(Z-1)+} + Au+.
29 citations
01 Jul 1998-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this paper, high-charged atoms produced in an electron beam ion trap were stored after the electron beam was turned off by operating the trap in the magnetic trapping mode, which allowed monitoring charge exchange reactions between the stored ions and residual neutral gas present in the trap by X-ray detection.
Abstract: Highly charged atoms produced in an electron beam ion trap were stored after the electron beam was turned off by operating the trap in the magnetic trapping mode. Such storage allowed monitoring charge exchange reactions between the stored ions and residual neutral gas present in the trap by X-ray detection. The charge exchange reactions were enhanced by the application of a pulse of neutral gas. The method was exemplified for the case of H-like uranium interacting with neutral neon, where the K-shell X-rays and the series limit for the electron capture of U91+ were observed.
18 citations