Analysis of the xuv photoabsorption spectrum of Au2+, Au3+, and Au4+
Analysis of the xuv photoabsorption spectrum of Au2+, Au3+, and Au4+
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DOI：
10.1103/physreva.79.042507
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发表时间：
2009-04
影响因子：
2.9
通讯作者：
M. Su;C. Dong;N. Murphy;G. O’Sullivan
中科院分区：
文献类型：
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作者：
M. Su;C. Dong;N. Murphy;G. O’Sullivan
对Au2+、Au3+和Au4+在70 ~ 127 eV范围内的光吸收过程进行了理论和实验研究。利用双激光产生等离子体技术，在50 ns的时间延迟下记录了4f和5p的光吸收光谱，发现4f-5d、6d和5p-5d、6s跃迁中的大量谱线占主导地位，并通过hartri - fock与组态相互作用计算进行了比较。光谱的特征是包含一个或两个6s电子的激发态的卫星谱线比共振谱线更重要，随着电离的增加，具有一个6s旁观电子的状态的卫星谱线的贡献逐渐比具有两个6s旁观电子的状态的卫星谱线的贡献更重要。基于激发态间归一化玻尔兹曼分布的假设和稳态碰撞辐射模型，我们成功地再现了与实验结果吻合较好的光谱。
The photoabsorption processes of Au2+, Au3+, and Au4+ have been investigated experimentally and theoretically in the 70-127 eV region. Using the dual laser-produced plasma technique, the 4f and 5p photoabsorption spectrum has been recorded at 50 ns time delay and was found to be dominated by a great number of lines from 4f-5d, 6d and 5p-5d, 6s transitions, which have been identified by comparison with the aid of Hartree-Fock with configuration interaction calculations. The characteristic feature of the spectrum is that satellite lines from excited configurations containing one or two 6s electrons are more important than resonance lines, and with increasing ionization, satellite contributions from states with one 6s spectator electron gradually become more important than those with two 6s spectator electrons. Based on the assumption of a normalized Boltzmann distribution among the excited states and a steady-state collisional-radiative model, we succeeded in reproducing a spectrum which is in good agreement with experiment.