The X(1)Σg(+) ground state of Mg2 studied by Fourier-transform spectroscopy.
The X(1)Σg(+) ground state of Mg2 studied by Fourier-transform spectroscopy.
复制标题
DOI：
10.1063/1.4792725
复制
发表时间：
2013-03
期刊：
影响因子：
--
通讯作者：
H. Knöckel;S. Rühmann;E. Tiemann
中科院分区：
文献类型：
--
作者：
H. Knöckel;S. Rühmann;E. Tiemann
用高分辨傅里叶变换光谱研究了镁的A(1)Σu(+)-X(1)Σg(+)紫外光谱。在热管中产生了镁蒸气。已经采用了各种光谱方法，例如利用宽带灯的光的传统吸收光谱和激光诱导荧光。傅里叶变换光谱仪的高分辨率，加上计算机辅助的光谱评估方法，可以产生精确的跃迁频率。新的数据和从早期研究中获得的数据被应用于低电子态和高电子态的直接势拟合。采用了基态X(1)Σg(+)势能曲线的各种表示，并讨论了它们在最小参数数目方面的好处。计算了同核同位素的散射长度，并与前人的结果进行了比较。
The A(1)Σu(+) - X(1)Σg(+) UV spectrum of Mg2 has been investigated with high resolution Fourier-transform spectroscopy. Mg2 vapor was created in a heat pipe. Various spectroscopic methods have been employed, such as conventional absorption spectroscopy with light from a broad band lamp and laser-induced fluorescence. The high resolution of the Fourier-transform spectrometer, together with computer aided evaluation methods of the spectra, yields precise transition frequencies. The new data and data available from earlier investigations are applied in direct potential fits of lower and upper electronic states. Various representations of potential energy curves for the ground state X(1)Σg(+) have been employed and their benefits in terms of smallest number of parameters are discussed. Scattering lengths are derived for the homonuclear isotopologues and compared with previous results.