An improved approach for hydrogen analysis in metal samples using single laser-induced gas plasma and target plasma at helium atmospheric pressure
An improved approach for hydrogen analysis in metal samples using single laser-induced gas plasma and target plasma at helium atmospheric pressure
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DOI：
10.1007/s00340-005-1973-4
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发表时间：
2006-01-01
影响因子：
2.1
通讯作者：
Tjia, MO
中科院分区：
文献类型：
--
作者：
Abdulmadjid, SN;Suliyanti, MM;Tjia, MO
本文报道了用激光诱导击穿光谱（LIBS）基本方案在高压氦气环境中对固体样品进行氢分析的实验研究结果。结果表明，利用氦原子的亚稳态激发态可以诱导烧蚀氢原子的延迟激发，从而避免了导致激发效率低下的斯塔克展宽效应和失配效应.进一步证明，对于锆合金等高沸点材料的样品，可以通过新引入的双激发技术实现成功的氢分析，该技术采用在传统LIBS方法的修改配置中实现的单激光器。
We report in this paper the results of an experimental study on hydrogen analysis of solid samples in high pressure helium ambient gas employing the basic scheme of laser induced breakdown spectroscopy (LIBS). It is shown that the metastable excited state of helium atom can be utilized to induce delayed excitation of the ablated hydrogen atoms, and thereby avoid the Stark broadening effect as well as overcoming the undesirable mismatch effect, which are responsible for inefficient excitation respectively. It is further demonstrated that for samples of high boiling-point materials such as zircaloy, successful hydrogen analysis can be achieved by a newly introduced double excitation technique employing single laser realized in a modified configuration of the conventional LIBS method.