Measurement of the magnetic moment of the 4.49-MeV (5-) state of 40Ca

The g factor of the 4.49-MeV (5⁻) state of ⁴⁰Ca has been measured in a time integral, external magnetic field, perturbed angular correlation experiment. A value of g=0.54±0.10 was obtained. The angular rotation of the p^'-γ correlation for the 4.49-MeV (5⁻) state was also measured for calcium nuclei implanted into a polarized iron foil. This measurement yields an average hyperfine magnetic field on calcium in iron which differs by a factor of 2 from the hyperfine field result obtained for ⁴²Ca (3.19-MeV, 6⁺ state) implanted in iron. The discrepancy in observed fields indicates a multiplicity of lattice sites for this system. The theoretical estimate of the 5⁻ state g factor is in agreement with the experimental value.NUCLEAR MOMENTS ⁴⁰Ca(p,p^'γ); measured μ (5⁻, 4.49-MeV level) and H_hyp at Ca(Fe).