Spectroscopy of Mg atoms solvated in helium nanodroplets
Spectroscopy of Mg atoms solvated in helium nanodroplets
复制标题
氦纳米液滴中溶剂化的镁原子的光谱
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Scoles
中科院分区：
文献类型：
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作者：
J. Reho;U. Merker;Matthew R. Radcliff;K. Lehmann;G. Scoles
测量了氦纳米液滴中Mg原子3~ 1 P_（10）←3~ 1 S_0跃迁的激光诱导荧光激发谱。 观察到的蓝移和线加宽的镜子中观察到的移动和增宽的研究中的镁原子在散装液氦溶剂化。这种相似性使我们能够得出结论，镁原子驻留在氦滴的内部。31 P10 ← 31 S 0跃迁表现出分裂，我们认为这是激发后在溶质原子周围形成的空腔的四极形变所致。 从溶剂化的3 1 P10 Mg的荧光的时间演化产生比在真空中发现的（1.99± 0.08 ns）更长的寿命（2.39± 0.05 ns）。 这种差异可以通过评价激发Mg原子附近氦密度的各向异性分布来定量地解释。本文还根据Ancilotto等[F. Ancilotto，P. B. Lerner和M.什...
We have measured the laser-induced fluorescence excitation spectra of the 3 1P10←3 1S0 transition of Mg atoms solvated in helium nanodroplets. The observed blue shifts and line broadenings mirror the shifts and broadenings observed in studies of Mg atoms solvated in bulk liquid helium. This similarity allows us to conclude that Mg atoms reside in the interior of the helium droplet. The 3 1P10←3 1S0 transition shows a splitting which we attribute to a quadrupolelike deformation of the cavity which forms around the solute atom after excitation. Temporal evolution of the fluorescence from the solvated 3 1P10 Mg yields a longer lifetime (2.39±0.05 ns) than found in vacuum (1.99±0.08 ns). This difference can be accounted for quantitatively by evaluation of the anisotropic distribution of the helium density in the neighborhood of the excited Mg atom. The question of solvation vs surface location for the guest atoms is also discussed in light of the model of Ancilotto et al. [F. Ancilotto, P. B. Lerner, and M. W...