论文标题
Pfi-Zeke Photelectron光谱的电子基态的表征
Characterization of the electronic ground state of Mg$_2^+$ by PFI-ZEKE photoelectron spectroscopy
论文作者
论文摘要
$ \ mathrm {x}^+\^2σ_U^+$ Mg $ _2^+$ ion的地面电子状态已通过脉冲磁场零离子化 - 运动能源（PFI-Zeke）光电学光谱研究。从$ \ mathrm {x} \^1σ_g^+（v“ = 0）$ vibronic状态。 $ \ mathrm {x}^+$状态记录了旋转分辨率，其分析导致确定这些级别的准确期限和旋转常数。 $^{24} $ mg $ _2^+$（$ 10 572.3（6）$ cm $^{ - 1} $从实验数据确定。
The $\mathrm{X}^+\ ^2Σ_u^+$ ground electronic state of the Mg$_2^+$ ion has been studied by pulsed-field-ionization zero-kinetic-energy (PFI-ZEKE) photoelectron spectroscopy. Rotationally cold Mg$_2$ molecules produced in a laser-ablation supersonic-expansion source were ionized by resonant two-photon absorption from the $\mathrm{X}\ ^1Σ_g^+(v"=0)$ ground vibronic state. The photoelectron spectra of the $v^+=3-14$ vibrational levels of the $\mathrm{X}^+$ state were recorded with rotational resolution and their analysis led to the determination of accurate term values and rotational constants for these levels. Improved values of the adiabatic ionization energy of $^{24}$Mg$_2$ ($51\,503.9(4)$ cm$^{-1}$) and of the ground-state dissociation energy of $^{24}$Mg$_2^+$ ($10 572.3(6)$ cm$^{-1}$) were determined from experimental data.
