Time-resolved measurement of atomic emission enhancement by fs-ns dual-pulsed laser-induced breakdown spectroscopy

• 来源期刊: 中国物理（英文版）
• 关键词: time-resolved measurement atomic emission enhancement dual-pulse LIBS
• 年，卷（期）: 2006,（10）
• 页码范围: 2271-2274
• 页数: 4页
• 语种: 英文

摘要

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.