显现超流体最初端倪的分子——氦团簇

Molecular-helium clusters showing onset of superfluidity

最近 ,文章作者所在的研究小组发表了数篇关于氦原子数多达二十的气相分子团簇的振动转动光谱的实验观测 .研究结果表明 ,N2 O分子和CO2 分子的氦团簇在氦原子数为 7个和 6个时就分别显示出分子超流体现象的开端 .

Recently, we published several papers on the gas-phase high resolution spectroscopy of He N-OCS, -N 2O, -CO, and -CO 2 clusters with N up to 20. The results showed that molecular clusters with less than ten helium atoms (seven for He N-N 2O and six for He N-CO 2) display the onset of molecular superfluidity. A summary is presented here on our latest experimental progress, as well as background and essential physical meaning of these spectroscopic observations.