Stark broadening measurements of Al II, Al III and He I 388.86 nm spectral lines at high electron densities
Stark broadening measurements of Al II, Al III and He I 388.86 nm spectral lines at high electron densities
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DOI：
10.1016/j.sab.2020.105816
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发表时间：
2020-04-01
影响因子：
3.3
通讯作者：
Djenize, Stevan
中科院分区：
文献类型：
--
作者：
Dojic, Dejan;Skocic, Milos;Djenize, Stevan
本文给出了单电离铝原子（Al Ⅱ）的5条谱线和双电离铝原子（Al Ⅲ）的8条谱线的斯塔克宽度展宽参数（w）的实验结果。Al III值是第一个实验数据。实验是在减压氦氢混合气体中的激光诱导等离子体中进行的。从侧面记录了等离子体的横向分辨谱，通过Abel逆变换得到了等离子体参数。根据氢原子H β谱线的展宽，估算了电子密度的范围为（0.98-4.86）× 10 ~（23）m ~（-3）。实验中的电子温度范围为20 000 ~ 28 000 K，采用玻尔兹曼和Saha-Boltzmann方法确定。Al II和Al III谱线的斯塔克展宽参数与现有的实验和理论结果进行了比较。我们还给出了中性氦388.86 nm谱线在电子密度大于1 × 10 ~（23）m ~（-3）时的斯塔克宽度和位移（d）的实验结果，其中现有的w和d数据是有限的。一些新的Al Ⅲ w值为等离子体诊断提供了方便。
Experimental Stark width broadening parameters (w) for 5 spectral lines of singly (Al II) and 8 spectral lines of doubly ionized aluminum atoms (Al III) are presented. The for Al III values are the first experimental data. The experiment was conducted in laser-induced plasma in helium-hydrogen gas mixture at reduced pressure. The laterally resolved spectra are recorded side-on. The plasma parameters are inferred after applying inverse Abel transform. The electron densities ranging from (0.98-4.86) x 10(23) m(-3) are estimated relying on broadening of hydrogen H beta spectral line. The electron temperature in experiment was in the range 20 000 K to 28 000 K and it was determined applying Boltzmann and Saha-Boltzmann method. Stark broadening parameters for Al II and Al III spectral lines are compared with available experimental and theoretical results. We also present experimental Stark widths and shifts (d) for neutral helium 388.86 nm spectral line at electron densities above 1 x 10(23) m(-3), where the existing number of w and d data is limited. Some of new Al III w values are convenient for plasma diagnostics.