Source: cirosantilli/forbidden-mechanism
= Forbidden mechanism
{wiki}
Bibliography:
* https://phys.libretexts.org/Bookshelves/Quantum_Mechanics/Introductory_Quantum_Mechanics_(Fitzpatrick)/12%3A_Time-Dependent_Perturbation_Theory/12.13%3A_Forbidden_Transitions from <Introductory Quantum Mechanics by Richard Fitzpatrick (2020)>