The Zeeman effect is an important topic in atomic spectroscopy. The induced
change in transition frequencies and amplitudes finds applications in the
Earth-field-range magnetometry. At intermediate magnetic field amplitude BβΌB0β=Ahfsβ/ΞΌBβ, where Ahfsβ is the magnetic dipole constant
of the ground state, and ΞΌBβ is the Bohr magneton (B0ββ1.7 kG for
Cs), the rigorous rule ΞF=0,Β±1 is affected by the coupling between
magnetic sub-levels induced by the field. Transitions satisfying ΞF=Β±2, referred to as magnetically-induced transitions, can be observed. Here,
we show that a significant redistribution of the Cs 6S1/2ββ6P3/2β magnetically-induced transition intensities occurs with
increasing magnetic field. We observe that the strongest transition in the
group Fgβ=3βFeβ=5 (Ο+ polarization) for B<B0β cease to
be the strongest for B>3B0β. On the other hand, the strongest transition in
the group Fgβ=2βFeβ=4 (Οβ polarization) remains so for all
our measurements with magnetic fields up to 9 kG. These results are in
agreement with a theoretical model. The model predicts that similar
observations can be made for all alkali metals, including Na, K and Rb atoms.
Our findings are important for magnetometers utilizing the Zeeman effect above
Earth field, following the rapid development of micro-machined vapor-cell-based
sensors