Appearance size of poly-anionic aluminum clusters, Al n z- , z = 2–5*
作者： Franklin Martinez , Steffi Bandelow , Christian Breitenfeldt , Gerrit Marx , Lutz Schweikhard
DOI: 10.1140/EPJD/E2012-30265-3
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摘要: The production of poly-anionic metal clusters by simultaneous storage electrons and cluster anions in a Penning trap has been extended to the fifth charge state. minimum size, required attach excess electron, experimentally determined for aluminum clusters. A refined data evaluation method is proposed, redefining appearance size with respect delayed electron emission. It applied penta-anions as well previous In addition, new measurements di-anions have revealed lower than reported earlier. Comparison experimental results predictions conducting-sphere model di-, tri-, tetra- show deviations that are probably due thermal excitation anions. cluster-size dependence poly-anion abundance spectra qualitatively reproduced thermionic
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