Production of small doubly charged negative carbon cluster ions by sputtering

Stephen N. Schauer, Peter Williams, R. N. Compton

Research output: Contribution to journalArticlepeer-review

174 Scopus citations


Carbon cluster ions with a double negative charge, and lifetimes of at least 10s, have been produced by sputtering graphite, and observed in a double-focusing mass spectrometer. Ions as small as C72- have been detected. The intensities of the doubly charged clusters (Cn2- where n=728) follow an alternating pattern, with even-n clusters being more intense than neighboring odd-n clusters. In contrast, even-n singly charged clusters are more intense than odd n for n9, and less intense for n13, where the clusters are believed to be cyclic.

Original languageEnglish (US)
Pages (from-to)625-628
Number of pages4
JournalPhysical Review Letters
Issue number5
StatePublished - 1990

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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