Can s oribtal electrons only drop to other s orbitals?

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1. Oct 11, 2015

friendbobbiny

Just a thought:

The momentum quantum number given for s states is l = 0. If an S state electron dropped in energy, and emitted a photon with l = 1, what would take place?

Am I correct that the electron could only drop to a lower l = 0 (an S state) orbital?

2. Oct 11, 2015

PietKuip

Dipole transitions from s are only allowed to p orbitals.

3. Oct 11, 2015

friendbobbiny

Why can't a drop to s take place? I infer that a drop to p(l = 1) can take place because $$\Delta l$$ = 1.

4. Oct 12, 2015

PietKuip

The dipole operator is odd, so it only gives overlap between states with odd and even symmetry.