期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 79, 期 4-6, 页码 1591-1594出版社
SPRINGER
DOI: 10.1007/s00339-004-2856-y
关键词
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Neutral silicon clusters Si-n (up to n=7) and their cations Si-n(+) (up to n=10) have been produced by femtosecond laser ablation of bulk silicon in vacuum and investigated using time-of-flight mass spectrometry. Two populations of the Si-n(+) clusters with different velocity and abundance distributions in the ablation plume have been clearly distinguished. Possible mechanisms of cluster formation (Coulomb explosion, gas-phase condensation, phase explosion) are discussed.
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