Silicon clusters produced by femtosecond laser ablation: Non-thermal emission and gas-phase condensation

Details Silicon clusters produced by femtosecond laser ablation: Non-thermal emission and gas-phase condensation Silicon clusters produced by femtosecond laser ablation: Non-thermal emission and gas-phase condensation

2004-03-10

arxiv.org/abs/physics/0403060v1

Applied Physics A 79 (2004) 1591-1594

Physics

Atomic and Molecular Clusters

Scientific paper

10.1007/s00339-004-2856-y

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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