Nuclear magnetic dipole moment effect on the angular distribution of the Kα lines

We present a theoretical analysis of the fine-structure transitions $1s2p{}^{1,3}{P}_{1,2}\to 1s^2{}^1{S}_0$ for helium-like heavy ions with non-zero nuclear spin. The angular distribution of these transitions is studied for its sensitivity with regard to the nuclear magnetic dipole moment ${\mu }_I$. Detailed calculations, performed for the helium-like ${Sn}^{48+}$, ${Xe}^{52+}$ and ${Tl}^{79+}$ ions with nuclear spin $I=1/2$, indicate that the emission pattern of the ${}^3{P}_2\to {}^1{S}_0$ fine-structure resolved photons is significantly affected by ${\mu }_I$ and that this effect can be addressed experimentally at present storage ring facilities. (paper)