Time-resolved appearance energies for fragment ions from C60

✍ Scribed by J. Laskin; J.M. Behm; K.R. Lykke; C. Lifshitz

• Book ID: 103034194
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 303 KB
• Volume: 252
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(96)00143-1

✦ Synopsis

Time-resolved appearance energies (AEs) were determined for C~-8 and C~-6 by electron ionization of C6o. Two methods were applied: (1) electron-space-charge trapping in the ion source of a tandem mass spectrometer and (2) Fourier transform mass spectrometry in an ion cyclotron resonance spectrometer. The AE for C5+8 obtained in the limit of long i ion trapping time at an evaporation temperature of 620 K is 44 + 2 eV. This corresponds to a minimum intrinsic kinetic shift, IS -30.4 eV due to radiative decay and agrees with recent results that cooling of C6o (and C~-0) is dominated by black-b0dy radiative decay below an internal temperature of 2300 K.