Chapter 11, Problem 11F.1P

Interpretation Introduction

Interpretation:

The electronic transition that is allowed in ${\text{O}}_{\text{2}}$ has to be stated.

Concept Introduction:

A term symbol describes the orbital, spin and total angular moment of an electronic state.  The symbol $\text{L}$ represents the vector sum of orbital angular momentum.  The symbol $\text{S}$ represents the vector sum of spin angular momentum.  The symbol $\text{J}$ represents the total angular momentum.  Therefore, the term symbol is represented as given below.

    ${}^{\text{2S+1}}{\text{L}}_{\text{J}}$

In the case of diatomic molecules, the term symbol is given by the formula as shown below.

    ${}^{\text{2S+1}}{\text{Λ}}_{\text{Ω}}$