关于原子基态光谱项的确定

Determination of Ground-State Spectroscopic Term of Atom

原子的基态光谱项是由原子外层电子的组态的耦合决定的,在L-S耦合时,对多电子体系,原子基态光谱项的确定分两种情况,一是同科电子的组态,二是非同科电子的组态,由于受泡利不相容原理的限制,两种组态基态光谱项的确定方法不同.笔者介绍了相应的L-S耦合法和投影合成法.

Ground- state spectroscopic term of atom is determined by coupling of configuration of outer- shell electron of atom. In the many - electron system, for L - S coupling, ground - state spectroscopic term of atom is determined by two situations,one is configuration of equivalent electron, the other is configuration of non - equivalent electron. According to Pauli exclusion principle, the determination methods of the two configurations on ground - state spectroscopic term are different. In this paper, we introduce L- S coupling method and projection synthesis method respectively.