The spatial distribution of the emission intensities of both copper (sample) and plasma gases from a laser-induced plasma was investigated by using a two-dimensionally imaging spectrometer system, when krypton, argon, or helium was employed under various pressure conditions. The shape and the intensities of the emission zone were strongly dependent on the kind and the pressure of the plasma gas. The emission zones of these plasma gases were generally concentrated near the sample surface, whereas those of the copper sample were more expanded towards the surrounding gas. The emission intensity of the copper line became enhanced at larger gas pressures of argon or krypton, while that was much less intense in the helium plasma. These effects could be explained by the difference in the cross-section of collisional excitation between krypton, argon and helium.
|ジャーナル||Yejin Fenxi/Metallurgical Analysis|
|出版ステータス||Published - 2009 3 1|
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