DYNAMIC OBSERVATION OF LASER-ABLATED CARBON PARTICLES USING TIME-RESOLVED X-RAY ABSORPTION SPECTROSCOPY

A. Miyashita, T. Ohyanagi, O. Yoda and K. Murakami
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A. Miyashita: Department of Materials Development, JAERI Takasaki, 1233 Watanuki, Takasaki, Gunma 370–12, Japan
T. Ohyanagi: Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
O. Yoda: Department of Materials Development, JAERI Takasaki, 1233 Watanuki, Takasaki, Gunma 370–12, Japan
K. Murakami: Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 191-195

Abstract: Time- and space-resolved characteristics of laser-ablated carbon particles were studied by x-ray absorption spectroscopy. Absorption peaks from the1s→2ptransition of neutral carbon atom(C0),C−,C+, andC2+ions were observed, An absorption peak from1s→π*and a broad absorption maximum from the1s→σ*transition of small clusters were also observed. Neutral carbon,C−,C+, and small carbon clusters were emitted from the sample long after laser irradiation. Spatial distributions of laser-ablated carbon particles in the localized helium-gas environment were measured. In the helium-gas environment, the ablation plume was depressed by the helium cloud generated on the top of the ablation plume.

Date: 1996
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DOI: 10.1142/S0218625X96000383

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