Magnetic field enhanced growth of carbon cluster ions in the laser ablation plume of graphite
1996; Elsevier BV; Volume: 96-98; Linguagem: Inglês
10.1016/0169-4332(95)00430-0
ISSN1873-5584
AutoresF. Kokai, Yasutoshi Koga, Robert B. Heimann,
Tópico(s)Laser-induced spectroscopy and plasma
ResumoTime-of-flight mass spectrometric studies were carried out on neutral and positive ion clusters, composed of up to twenty carbon atoms, produced by Nd:YAG laser ablation of graphite in the presence of magnetic fields in the range of 0.03–0.10 T. The growth of larger carbon cluster ions with C11+ dominance in the laser-ionized ablation plume of graphite was found to be enhanced by the magnetic fieds. We believe that an enhancement of ion-neutral reactions due to an increase of ionic species, resulting from collisional ionization of neutral species through a confinement of electrons, leads to the growth of larger carbon cluster ions.
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