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- W2093563896 abstract "The fullerene molecule is known to attach several electrons in the solid phase, but only recently has it been recognized that it can also attach electrons in the gas phase. The first electron - molecular beam results showed that and molecules non-dissociatively attached a single electron over the unusually wide electron energy range from near thermal to about 10 eV, but these studies were not able to provide either the magnitude of the cross sections or describe the low-energy attachment behaviour. But using our flowing afterglow - Langmuir probe (FALP) apparatus we have been able to determine the absolute attachment rate coefficients for both and over the electron temperature range 300 - 4500 K. These FALP experiments have shown that attachment to at low electron energies (<1 eV) proceeds predominantly by p-wave electron capture, and that a centrifugal barrier of 0.26 eV is evident which was corroborated by subsequent theory. A similar situation is observed for attachment to except that for this fullerene molecule there is evidence that at very low electron energies (< 0.05 eV) inefficient s-wave capture may also occur. These FALP data further indicate that at energies above about 0.3 eV extraordinarily efficient electron attachment occurs to both and , and when the mean thermal cross sections derived from these FALP data are used to normalize the crossed electron - molecular beam data at the common low energies accessible in both experiments, it is clear that electron attachment to these fullerene molecules is very efficient over a wide electron energy range from about 0.3 - 10 eV above which electron thermionic emission occurs from the hot and nascent negative ions." @default.
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- W2093563896 date "1996-11-14" @default.
- W2093563896 modified "2023-10-16" @default.
- W2093563896 title "Electron attachment to and in the gas phase" @default.
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- W2093563896 doi "https://doi.org/10.1088/0953-4075/29/21/030" @default.
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