Grisenti RE, Schollkopf W, Toennies JP, Hegerfeldt GC, Kohler T, Stoll M
Max-Planck-Institut fur Stromungsforschung, Bunsenstrasse 10, 37073 Gottingen, Germany.
Phys Rev Lett. 2000 Sep 11;85(11):2284-7. doi: 10.1103/PhysRevLett.85.2284.
A molecular beam consisting of small helium clusters is diffracted from a 100 nm period transmission grating. The relative dimer intensities have been measured out to the 7th order and are used to determine the reduction of the effective slit width resulting from the finite size of the dimer. From a theoretical analysis of the data which also takes into account the van der Waals interaction with the grating bars, the bond length (mean internuclear distance) and the binding energy are found to be
一束由小氦团簇组成的分子束从一个周期为100纳米的透射光栅发生衍射。已测量出相对二聚体强度直至七阶，并用于确定由于二聚体的有限尺寸导致的有效狭缝宽度的减小。通过对数据的理论分析，其中还考虑了与光栅条的范德华相互作用，发现键长（平均核间距）和结合能分别为
