We have measured the hyperfine constants A${(}^2$${\mathit{S}}_{1/2}$), A${(}^2$${\mathit{P}}_{1/2}$), and A${(}^2$${\mathit{P}}_{3/2}$) for ${\mathrm{Ca}}^{+}$. We compare our results with the calculations of Mårtensson-Pendrill and Salomonson [Phys. Rev. A 30, 712 (1984)], who used many-body perturbation theory (MBPT). The agreement between our results and MBPT calculations for ${\mathrm{Ca}}^{+}$ is about 3%, which is comparable to similar comparisons reported for Cs [S. Blundell, in 2 Relativistic, Quantum Electrodynamic, and Weak Interaction Effects in Atoms, AIP Conf. Proc. No. 189, edited by Walter Johnson, Peter Mohr, and Joseph Sucher (AIP, New York, 1988)].

• Received 16 February 1990

DOI:https://doi.org/10.1103/PhysRevA.42.649