Resonant Electron Capture Mass Spectra of Fullerenes C60 and C70

✍ Scribed by Yury V. Vasil'ev; Renat F. Tuktarov; Victor A. Mazunov

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 204 KB
• Volume: 11
• Category: Article
• ISSN: 0951-4198
• DOI: 10.1002/(sici)1097-0231(19970422)11:7<757::aid-rcm858>3.0.co;2-4

✦ Synopsis

Resonant electron capture by C 60 and C 70 was studied and it was established that long-lived (i.e. mass spectrometrically observable) parent negative ions are formed within an extremely broad energy region (0-14 eV). It has been shown that effective yield curves of C 60 -and C 70 -in the thermal energy region have resonant peaks at 0.05 ± 0.01 and 0.06 ± 0.01 eV, respectively. Owing to the higher energy resolution than in previously published experiments, it was possible to observe another resonant state at ca. 0 eV for both fullerenes (as a shoulder on the effective yield curve). This gives evidence of the possibility of s-electron attachment by the fullerenes. A correlation between electron capture, electron loss energy and photoelectron spectra was found. At 6.5 eV and above, C 60 -and C 70 -are subject to electron autodetachment and mean lifetime and mean decay rates were directly measured.