转动能级：当分子在同一电子能级和同一振动能级时,它们的能量还要因转动情况的不同分为若干"分级",称为转动能级。
也就是说，常温会，激发分子的一些转动能级。
In other words, ordinary thermal energies do populate some number of rotational levels of molecules.
事实上，转动能级的间距，相对于室温的kT是很小的。
Turns out that, in fact, the energy separation between rotational levels is very small compared to kT at room temperature.
但是对于转动能级，分子并不总是处于最低能级。
But rotation, for sure. They're not all in the lowest level.
应用推荐