We use a nonsingular-potential model for heavy quarkonia proposed by Gupta, Repko, and Suchyta to calculate the transition amplitudes for the magnetic-dipole ($M1\mathrm{}$) one-photon radiative decays of the $c\overline{c}$ and $b\overline{b}$ bound systems. The wave functions of the bound systems are calculated by a nonperturbative treatment. The results are in better agreement with the experimental data than those predicted using other potential models.

• Received 3 December 1990

DOI:https://doi.org/10.1103/PhysRevD.44.1606