[Study of the excitation and diffusion processes of sample atoms in a microwave boosted microsecond-pulse glow discharge source with optical emission spectrometry].
The excitation and diffusion processes of brass sample atoms in a GD-MIP tandem source have been studied with a home-made MIP boosted micros-pulse GD device. Experimental results show that under relatively low discharge pressure (< 180Pa), the micros-pulse GD can couple quite well with MIP and emit strong radiation of analytical lines. When the GD source is operated under a pressure higher than 200Pa, two emission peaks appear independently in time for a given resonant atomic line, because sample atoms are structurally excited separately first by the micros-pulse GD and then by the MIP. According to the two emission peaks, the diffusing velocities of copper atoms and zinc atoms can be calculated, yielding values of 150 and 129m/s, respectively, and the most excited area in-the micros-pulse GD is about 1.94-2.25mm away from the sputtering surface of the sample cathode. The effects of discharge parameters on emission intensities have been also investigated.
Su
Y
Y
Department of Chemistry, Laboratory of Analytical Science, Xiamen University, 361005 Xiamen.
Yang
P
P
Chen
D
D
Zhou
Z
Z
Wang
X
X
Huang
B
B