Dissociation pathways of doubly and triply charged gold clusters

verfasst von

J. Ziegler, G. Dietrich, S. Krückeberg, K. Lützenkirchen, L. Schweikhard, Clemens Walther

Abstract

Collision induced dissociation is applied to study the fragmentation channels of multiply charged gold clusters, Au²⁺_N, size N = 7-35, and Au³⁺_N, N = 19-35, stored in an ion cyclotron resonance (Penning) trap. The main dissociation pathways are neutral monomer evaporation, Au^Z+_N → Au^Z+_N-1 + Au, for the larger and fission into a charged trimer plus the remaining cluster, Au^Z+_N → Au^(Z-1)+_N-3 + 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^Z+_N → Au^Z+_N-2 + Au₂, and of extremely asymmetric fission of the form Au^Z+_N → Au^(Z-1)+_N-1 + Au⁺.

Externe Organisation(en)

Johannes Gutenberg-Universität Mainz
Deutsche Bank AG
SerCon GmbH
Institut de Recherches Subatomiques

Typ

Artikel

Journal

Hyperfine Interactions

Band

115

Seiten

171-179

Anzahl der Seiten

9

ISSN

0304-3843

Publikationsdatum

12.1998

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Atom- und Molekularphysik sowie Optik, Kern- und Hochenergiephysik, Physik der kondensierten Materie, Physikalische und Theoretische Chemie