Zeeman Crossover — Hydrogen 2p Manifold

Fine structure + external field: weak-field anomalous Zeeman → Paschen-Back regime

Current B

Weak field
6 states: |j, mj
mj = +3/2 (j=3/2)
other j=3/2 states
- - j=1/2 states
ΔEfs = 4.5×10⁻⁵ eV
Bc ≈ 0.78 T
0.50 T