Delayed ionisation of C76
| Autor: | K. Kikuchi, N. Takahashi, Y. Achiba, S. Suzuki, Preben Hvelplund, T. Kodama, Shigeo Tomita, A. Gromov, B. Concina, Jens Ulrik Andersen |
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| Rok vydání: | 2006 |
| Předmět: |
Arrhenius equation
Chemistry Astrophysics::Cosmology and Extragalactic Astrophysics Electron Condensed Matter Physics Bond-dissociation energy Dissociation (chemistry) Ion symbols.namesake Excited state Ionization Mass spectrum symbols Physical and Theoretical Chemistry Atomic physics Instrumentation Astrophysics::Galaxy Astrophysics Spectroscopy |
| Zdroj: | International Journal of Mass Spectrometry. 252:96-99 |
| ISSN: | 1387-3806 |
| DOI: | 10.1016/j.ijms.2005.11.029 |
| Popis: | A delayed ionisation experiment has been carried out on laser excited C 76 molecules. Ions and electrons are detected in coincidence to distinguish the ionisation of C 76 from that of C 74 molecules created by the dominant process, emission of C 2 . From the power-law dependence of the C 76 + yield on time we deduce the dissociation energy, E d = 8.2 ± 0.3 eV. The relative yield of C 74 + is consistent with very similar Arrhenius parameters for C 76 and C 74 , both for ionisation and for C 2 emission. With the assumption of a frequency factor for dissociation, A d = 10 19 s −1 , the power of photon emission from neutral C 76 is also determined from the experiment. It is consistent with predictions based on oscillator strengths derived from inelastic electron scattering. |
| Databáze: | OpenAIRE |
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