Decay channels and appearance sizes of doubly anionic gold and silver clusters

Details Decay channels and appearance sizes of doubly anionic gold and silver clusters Decay channels and appearance sizes of doubly anionic gold and silver clusters

2000-01-15

arxiv.org/abs/physics/0001032v1

Phys.Rev. B61 (2000) 10587

Physics

Atomic and Molecular Clusters

Latex/Revtex, 4 pages with 3 eps figures incorporated in the text. For related papers, see http://www.prism.gatech.edu/~ph274c

Scientific paper

10.1103/PhysRevB.61.R10587

Second electron affinities of Au_N and Ag_N clusters and the dissociation energies for fission of the Au_N^{2-} and Ag_N^{2-} dianions are calculated using the finite-temperature shell-correction method and allowing for triaxial deformations. Dianionic clusters with N > 2 are found to be energetically stable against fission, leaving electron autodetachment as the dominant decay process. The second electron affinities exhibit pronounced shell effects in excellent agreement with measured abundance spectra for Au_N^{2-} (N < 30), with appearance sizes N=12 for gold dianionic clusters and N=24 for silver dianionic clusters.

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