Effect of gas pressure on ionization of ambient gas

被引：0

作者：

SONG Guangle SONG Yizhong Department of Physics Linyi Teachers University Linyi Biomaterials Lab Department of materiel science the southern zone Shandong University Jinan ^{[1
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机构：

来源：

原子与分子物理学报 | 2002年 / 03期

关键词：

Laser ablating; Time-and space-resolved spectrum; Characteristic line; Mechanism of ionization; Quantum theory;

D O I：

暂无

中图分类号：

O536 [辐射与测量];

学科分类号：

摘要：

An Nd: YAG pulsed laser (145 mJ) was used to ablate aluminum target and Ar was used as protecting gas. Time-and space-resolved spectra of the plasmas under pressure 100 Pa, 1 kPa, 10 kPa and 100 kPa were acquired with time- and space-resolved technique. The characteristics of the plasma radiating under each pressure were briefly described, and the laws of Ar characteristical radiaton were analyzed in detail. Based on the profile of Ar characteristical radiation under these pressure, the relation between protecting gas pressure and its ionization was briefly discussed, and explained with quantum theory. Farther more, the mechanism of ambient gas ionization was investigated. As the result, it was suggested that the main mechanism inducing protecting gas to ionize should be the absorption of the plasma continuum radiation by the gas.

引用

页码：272 / 276

页数：5