Characteristics of emission from laser-induced plasma of metallic compounds in gaseous condition: The effects of gas pressure and laser pulse energy. Issue 6 (2nd July 2016)

• Record Type: Journal Article
• Authors: Wang, Zhen Zhen; Deguchi, Yoshihiro; Liu, Ren Wei; Yan, Jun Jie; Liu, Ji Ping
• Is Part Of: Spectroscopy letters. Volume 49:Issue 6(2016)
• Page Start: 396
• Page End: 403
• Publication Date: 2016-07-02
• Subjects: Laser-induced breakdown spectroscopy -- low pressure -- plasma generation process -- trace species; Spectrum analysis -- Periodicals; 543.5
• DOI: 10.1080/00387010.2016.1173064
• Languages: English
• ISSNs: 0038-7010

Abstract

ABSTRACT: Low-pressure laser-induced breakdown spectroscopy (LIBS) was employed to measure mercury, strontium, and cesium under different conditions. Mercury was measured in detail to discuss the effects of pressure, laser pulse energy, delay time, and buffer gas. The continuum emission from plasma reduced dramatically to enhance signal-to-background ratio due to the change of influence of electron impact ionization process when reducing pressure and decreasing laser pulse energy to some extent. The comparison of mercuric chloride and mercury, as well as strontium and cesium measurements, demonstrates the enhancement of detection ability for trace species measurement using low-pressure LIBS.