Near-IR bromine Laser Induced Breakdown Spectroscopy detection and ambient gas effects on emission line asymmetric Stark broadening and shift

被引：25

作者：

Asimellis, George ^{[1
]}

Giannoudakos, Aggelos

Kompitsas, Michael

机构：

[1] Aristotle Univ Thessaloniki, Fac Phys, Thessaloniki 54124, Greece

[2] Natl Tech Univ Athens, Sch Chem Engn, Athens 15780, Greece

[3] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, GR-11635 Athens, Greece

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2006年 / 61卷 / 12期

关键词：

laser-induced breakdown spectroscopy; halogen detection; bromine content; Stark effect; ambient gas effects;

D O I：

10.1016/j.sab.2006.10.014

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Investigation via Laser-Induced Breakdown Spectroscopy of a near-infrared bromine emission line (827.2 nm) with an UltraViolet ablation laser and a gated detector is reported. The effects of ambient pressure and gas species (air, O-2, N-2 and He) on the atomic emission line strength and spectral profile were systematically investigated. Substantially improved signal strength and reduced background radiation are demonstrated near 100 mbar ambient pressure with all gases. Optimal results were achieved when helium was used. Asymmetric broadening and shift of the 827.2 nm bromine line, attributed to pressure-dependent Stark effect has been revealed. This effect is prominent when air, oxygen or nitrogen are present and is much less manifested when helium is used. Possible interpretations of this effect are presented. (c) 2006 Published by Elsevier B.V.

引用

页码：1270 / 1278

页数：9

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