Atomic hydrogen emission induced by TEA CO(2) laser bombardment on solid samples at low pressure and its analytical application.
Hydrogen emission has been studied in laser plasmas by focusing a TEA CO(2) laser (10.6 microm, 500 mJ, 200 ns) on various types of samples, such as glass, quartz, black plastic sheet, and oil on copper plate sub-target. It was found that H(alpha) emission with a narrow spectral width occurs with high efficiency when the laser plasma is produced in the low-pressure region. On the contrary, the conventional well-known laser-induced breakdown spectroscopy (LIBS), which is usually carried out at atmospheric air pressure, cannot be applied to the analysis of hydrogen as an impurity. By combining low-pressure laser-induced plasma spectroscopy with laser surface cleaning, a preliminary quantitative analysis was made on zircaloy pipe samples intentionally doped with hydrogen. As a result, a good linear relationship was obtained between H(alpha) emission intensity and its concentration.
Idris
Nasrullah
N
Department of Fiber Amenity Engineering, Graduate School of Engineering, University of Fukui, Fukui 910-8507, Japan.
Terai
Sumito
S
Lie
Tjung Jie
TJ
Kurniawan
Hendrik
H
Kobayashi
Takao
T
Maruyama
Tadashi
T
Kagawa
Kiichiro
K
D002623:Chemistry Techniques, Analytical / Q000379:methods; D006859:Hydrogen / Q000032:analysis*; D007834:Lasers; D008420:Manufactured Materials / Q000032:analysis*; D008422:Materials Testing / Q000379:methods*; D011312:Pressure; D013057:Spectrum Analysis / Q000379:methods*; D015040:Zirconium / Q000032:analysis* / Q000737:chemistry* / Q000528:radiation effects
D006859:Hydrogen; D015040:Zirconium