Measurement Of Magnetic-Moment Of 4.49-Mev (5-) State Of Ca-40

The $g$ factor of the 4.49-MeV (${5}^{\\ensuremath{-}}$) state of $^{40}\\mathrm{Ca}$ has been measured in a time integral, external magnetic field, perturbed angular correlation experiment. A value of $g=0.54\\ifmmode\\pm\\else\\textpm\\fi{}0.10$ was obtained. The angular rotation of the ${p}^{\\ensuremath{'}}\\ensuremath{-}\\ensuremath{\\gamma}$ correlation for the 4.49-MeV (${5}^{\\ensuremath{-}}$) 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 $^{42}\\mathrm{Ca}$ (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 ${5}^{\\ensuremath{-}}$ state $g$ factor is in agreement with the experimental value.NUCLEAR MOMENTS $^{40}\\mathrm{Ca}(p,{p}^{\\ensuremath{'}}\\ensuremath{\\gamma})$; measured $\\ensuremath{\\mu}$ (${5}^{\\ensuremath{-}}$, 4.49-MeV level) and ${H}_{\\mathrm{hyp}}$ at Ca(Fe).