论文标题
关于激光延迟发射在氩环境下产生铝等离子体
On the delayed emission from laser produced aluminum plasma under argon environment
论文作者
论文摘要
在本文中，我们报告了NS Laser中的铝中性（Al I）的长期发射（$ \ sim $ 250 $μs$）在存在环境氩的存在下产生了等离子体。该研究的激光功率密度，背景压力以及与目标的距离进行了不同。据报道，在早期观察到的发射光谱中的缓慢和快速峰成分已得到充分报道。但是，有趣的是，还首次观察到很长的延迟发射，这取决于激光功率密度，距目标距离，环境气体和压力。仅从中性观察到发射。由于环境气体的抗强度转移的能量转移，这种发射的最可能机理似乎是Al中性发射的激发和随后的发射。
In this article, we report rather long time emission ($\sim$ 250 $μs$) from aluminum neutrals (Al I) in ns laser produced plasma in the presence of ambient argon. The study is carried out with varying laser power density, background pressure, and the distance from the target. Slow and fast peak components in the emission spectra observed at earlier times are well reported. However, interestingly a very long delayed emission is also observed for the first time which depends on laser power density, distance from the target, ambient gas and pressure. The emission is observed from Al neutrals only. The most likely mechanism of this emission appears to be the excitation and subsequent emission from Al neutrals as a result of energy transfer from metastables of the ambient gas.
