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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >MUTA calculations of a laser-produced Mg hollow atom spectrum
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MUTA calculations of a laser-produced Mg hollow atom spectrum

机译：激光产生的Mg空心原子光谱的MUTA计算

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摘要

A study is made of the spectra produced from a short-wavelength long-pulse ( nanosecond) laser incident on a Mg plasma. A very complex experimental spectrum is analyzed in detail by comparison with large-scale atomic kinetics calculations using the recently developed mixed-UTA ( MUTA) model. We find that the experimental spectrum appears to contain lines from many inner-shell transitions from ions ranging from neutral Mg to Li-like Mg. Lines from transitions such as 1s-31, 1s-41, and from hollow atoms ( where in this context hollow atoms refer to ions with an empty 1s shell) are observed. The inclusion of very small fractions of hot electrons is demonstrated to make significant differences to the spectra. Although it is found that the calculations do not match perfectly the experimental spectra, reasonable agreement between the experiment and the theory can be obtained if temperature and density gradients are assumed present in the experimental conditions.
机译：研究了入射在Mg等离子体上的短波长长脉冲（纳秒）激光产生的光谱。通过使用最新开发的混合UTA（MUTA）模型与大规模原子动力学计算进行比较，详细分析了非常复杂的实验光谱。我们发现，实验光谱似乎包含了从许多内壳过渡到从中性Mg到类似Li的离子的谱线。观察到了来自诸如1s-31、1s-41之类的跃迁以及来自空心原子的线（在此上下文中，空心原子是指带有空1s壳的离子）。事实证明，包含极少量的热电子对光谱产生了显着差异。尽管发现计算结果与实验光谱不完全匹配，但是如果在实验条件下假设存在温度和密度梯度，则可以在实验和理论之间取得合理的一致性。

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