So I said that this technique was used to experimentally determine what the different binding energies or the different ionization energies are for the different states in a multielectron atom.

我说过，这项技术被用来,在实验上确定多电子原子的,各个不同态相应的束缚能,或者电离能。

麻省理工公开课 - 化学原理课程节选