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Magnetically induced (MI) transitions (F${}_{g}$ = 1 $\rightarrow$ F${}_{e}$=3) of ${}^{87}$Rb D${}_{2}$ line are among the most promising atomictransitions for applications in laser physics. They reach their maximumintensity in the 0.2--2 kG magnetic field range and are more intense than manyconventional atomic transitions. An important feature of MI transitions istheir large frequency shift with respect to the unperturbed hyperfinetransitions which reaches $\sim$12 GHz in magnetic fields of $\sim$ 3 kG, whilethey are formed on the high-frequency wing of the spectrum and do not overlapwith other transitions. Some important peculiarities have been demonstrated forthe MI 5S${}_{1/2}$$\rightarrow$ 5P${}_{3/2}$ transitions ($\lambda$=780 nm).Particularly, it was shown that using a nanocell with thickness $L= 100$~nm itis possible to realize 1 $\mu$m-spatial resolution which is important whendetermining magnetic fields with strong spatial gradient (of $>$~3G /$\mu$m).Earlier, our studies have been performed for 5S${}_{1/2}$ $\rightarrow$$n$P${}_{3/2}$ transition with $n = 5$, while it is also theoretically shown tobe promising for the transitions with $n = 6, 7, 8$ and $9$, corresponding tothe transition wavelengths of 420.2~nm, 358.7~nm, 334.9~nm and 322.8~nm,respectively.

Formation of narrow atomic lines of Rb in the UV region using a magnetic field