Time-resolved measurement of atomic emission enhancement by fs--ns dual-pulsed laser-induced breakdown spectroscopy
Yan Li-Xin(颜立新)a)b)†, Zhang Yong-Sheng(张永生)b), Zheng Guo-Xin(郑国鑫)b), Liu Jing-Ru(刘晶儒)b), Cheng Jian-Ping(程建平)a), and Lü Min(吕敏)a)
a Department of Engineering Physics, Tsinghua University, Beijing 100084, China; b Northwest Institute of Nuclear Technology, PO Box 69 26, Xi'an 710024, China
Abstract Time-resolved measurement of atomic emission enhancement is performed by using a 500-fs KrF laser pulse incident upon a high density supersonic O2 gas jet, synchronized with an orthogonal ns frequency-doubled Nd:YAG laser pulse. The ultra-short pulse serves as an igniter of the gas jet, and the subsequent ns-laser pulse significantly enhances the atomic emission. Analysis shows that the contributions to the enhancement effect are made mainly by the bremsstrahlung radiation and cascade ionization.
Received: 06 December 2005
Revised: 07 June 2006
Accepted manuscript online:
PACS:
78.47.-p
(Spectroscopy of solid state dynamics)
Fund: Project supported by the
National Natural Science Foundation of China (Grant No 10474081).
Cite this article:
Yan Li-Xin(颜立新), Zhang Yong-Sheng(张永生), Zheng Guo-Xin(郑国鑫), Liu Jing-Ru(刘晶儒), Cheng Jian-Ping(程建平), and Lü Min(吕敏) Time-resolved measurement of atomic emission enhancement by fs--ns dual-pulsed laser-induced breakdown spectroscopy 2006 Chinese Physics 15 2271
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