First observation of delayed electron emission from dianionic metal clusters
Int. J. Mass Spectrom. 252 (2), 151-156, May 2006
Submitted to Cluster Science: 5 January 2010
Last Update: 6 January 2011

10.1016/j.ijms.2006.01.051
OA Status: can archive pre-print and post-print or publisher's version/PDF

Abstract

Time-resolved electron emission after photoexcitation in a Penning trap has been applied to size and charge-state selected dianionic gold C, clusters, Au-29(2-). An exponential decrease of the relative abundance was recorded, along with a corresponding appearance of the monoanion Au-29(1-). This constitutes the first observation of delayed electron emission from a metal-cluster dianion. By application of the Weisskopf decay-rate model to the emission rate the binding energy of the second surplus electron was found to be 0.91(5) eV. This value compares favourably with the second electron affinity as expected from the liquid drop model. (C) 2006 Elsevier B.V. All rights reserved.

Classifications

Document Type experimental and theoretical
Research Field Electron Dynamics and Time-Resolved Spectroscopy

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