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Why is j=0 to j'=0 forbidden by the parity rule if spin orbit interaction is significant?
At least.Meir Achuz said:No matter what the interaction, a photon carries one unit of angular momentum.
The parity rule states that the parity of a system must remain unchanged under certain transformations, such as spatial inversion. This means that if the spatial coordinates of a system are reversed, the system should remain the same. When j=0 to j'=0, the spin of the system changes, violating the parity rule.
Spin-orbit interaction is the coupling between the spin and orbital angular momentum of a particle. This interaction arises due to the magnetic field created by the movement of the charged particle in its own electric field. It is a relativistic effect and is important in understanding the properties of atoms and molecules.
Spin-orbit interaction introduces a change in the spin of a system, which violates the parity rule. This is because the spatial inversion transformation also affects the direction of the spin, leading to a change in the overall parity of the system.
Yes, there are certain cases where j=0 to j'=0 transitions are allowed even though they violate the parity rule. This can happen in systems with strong spin-orbit coupling, where the spin and orbital angular momentum are strongly coupled, leading to a mixing of parity states.
The parity rule plays a crucial role in determining the allowed energy levels and transitions of electrons in atoms. It helps in understanding the selection rules for atomic transitions, which dictate which transitions are allowed and which are forbidden. This, in turn, has a significant impact on the spectral lines observed in atomic spectroscopy.