On the delayed emission from a laser-produced aluminum plasma under an argon environment

被引：6

作者：

Arora, Garima ^{[1
]}

Thomas, Jinto ^{[1
]}

Joshi, H. C. ^{[1
,2
]}

机构：

[1] HBNI, Inst Plasma Res, Gandhinagar 382428, Gujarat, India

[2] Homi Bhabha Natl Inst, Mumbai 400094, Maharashtra, India

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2022年 / 37卷 / 05期

关键词：

AMBIENT GAS; ION-ACCELERATION; EXPANSION; DYNAMICS; DENSITY; PLUME; SPECTROSCOPY; TEMPERATURE; FEATURES;

D O I：

10.1039/d2ja00065b

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this article, we report rather long time emission (similar to 250 mu s) from aluminum neutrals (Al I) in a ns laser-produced plasma in the presence of ambient argon. The study is carried out with varying laser power density, background pressure, and distance from the target. Slow and fast peak components in the emission spectra observed at earlier times are well reported. However, interestingly a very long delayed emission is also observed for the first time which depends on laser power density, distance from the target, ambient gas and pressure. The emission is observed from Al neutrals only. The most likely mechanism of this emission appears to be the excitation and subsequent emission from Al neutrals as a result of energy transfer from metastables of the ambient gas.

引用

页码：1119 / 1125

页数：7

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