论文标题
光诱导的分子在氦纳米圆形上的空间分离原子的形成
Photoinduced molecule formation of spatially separated atoms on helium nanodroplets
论文作者
论文摘要
除了用作光谱研究的冷基质外，超流体氦液滴还作为分子和簇合成的冷环境。由于与自由分子值相比，氦液滴中分子的振动频率几乎没有变化，因此可以假设溶剂化的颗粒在路径交叉的路径交叉后立即移动摩擦并进行反应。已经有一些无法解释的观察结果，似乎表明一个液滴上有两个物种的情况，而不是形成键，但仍是孤立的。在这项工作中，我们对掺杂一个rubidium和一个锶原子的氦液滴进行了系统的研究，表明除了对RBSR的反应外，还有一个可能在一个液滴上找到分离的RB和SR原子，仅在电子激发后反应。我们的结果进一步表明，地面SR原子可以驻留在表面和液滴内。
Besides the use as cold matrix for spectroscopic studies, superfluid helium droplets have served as a cold environment for the synthesis of molecules and clusters. Since vibrational frequencies of molecules in helium droplets exhibit almost no shift compared to the free molecule values, one could assume the solvated particles move frictionless and undergo a reaction as soon as their paths cross. There have been a few unexplained observations that seemed to indicate cases of two species on one droplet not forming bonds but remaining isolated. In this work, we performed a systematic study of helium droplets doped with one rubidium and one strontium atom showing that besides a reaction to RbSr, there is a probability of finding separated Rb and Sr atoms on one droplet that only react after electronic excitation. Our results further indicate that ground-state Sr atoms can reside at the surface as well as inside the droplet.
