摘要
为了提高激光诱导击穿光谱的信噪比,从理论上讨论了激光诱导击穿光谱信号与延迟时间之间的关系。利用激光诱导击穿光谱仪对GBW07716合成灰岩标准样品进行了测试,并分析了Ni I 305.432nm、Ni I 313.411nm、Ni I 351.505nm等3条谱线强度随延迟时间的变化特征。结果表明,谱线随延迟时间的变化趋势主要与能级的寿命有关,而不是跃迁几率Aij。当延迟时间大于2μs时,从同一高能级辐射出来的谱线随延迟时间的变化趋势相同,而从不同高能级跃迁到同一低能级的谱线随延迟时间的变化趋势不相同。
To improve the signal to noise ratio of laser-induced breakdown spectroscopy,a relation between the signals of laser-induced breakdown spectroscopy and the delay time was discussed in theory.The tests on the GBW07716 synthetic limestone certified reference samples with laser-induced breakdown spectrometer were conducted and the changes in such lines as Ni I 305.432 nm,Ni I 313.411 nm and Ni I 351.505 nm with the delay time were analyzed.The results showed that the changes of spectral lines with delay time were mainly closely related with the life of energy level instead of the transition probability Aij.When delay time surpassed 2 μs,the spectral lines emitted from the same high level exhibited the same trend along delay time,while the spectral line transited from different energy levels to the same lower energy level showed discrepancy in their changes with delay time.
出处
《冶金分析》
CAS
CSCD
北大核心
2013年第11期1-5,共5页
Metallurgical Analysis
基金
湖北省自然科学基金项目(2012FFB00105)
湖北省教育厅科学研究计划项目(B2013288)
关键词
激光诱导击穿光谱
镍
谱线强度
延迟时间
能级
laser-induced breakdown spectroscopy
nickel
spectral line intensity
delay time
energy level
