Phys. Rev. Lett. 78, 4367–4370 (1997)Electron Attachment to a Negative Ion: e + C84- ⇌ C84-2Received 9 December 1996; published in the issue dated 9 June 1997 The observation of sequential attachment of two electrons to the C84 molecule and the subsequent autodetachment of the C84 dianion is reported. Remarkably, the cross section for attaching the second electron is estimated to be of the same order as that for adding the first electron. The measured lifetime for autodetachment of C84-2 (∼60 μsec) is in accord with calculations assuming “thermionic emission” from the vibrationally hot dianion. The first (EA1) and second (EA2) electron affinities of the two low-lying D2 and D2d isomers of C84 are calculated using density functional theory to be +3.14 and +0.44 eV, respectively. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.78.4367
DOI:
10.1103/PhysRevLett.78.4367
PACS:
36.40.-c, 34.80.Lx
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