Spin and Nuclear Moments of 2.3-DayCd115and of 43-DayCd115m

The Zeeman structure and hfs in the $\mathrm{}\left(5s5p\right)\mathrm{}{}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}$ state of 2.3-day ${\mathrm{Cd}}^{115}$ and 43-day ${\mathrm{Cd}}^{115m}$ have been determined by the optical double-resonance technique. The nuclear spin $I$, magnetic dipole coupling constant $A$, and electric quadrupole coupling constant $B$, are: $I\left(115\right)=\frac{1}{2}$, $A\left(115\right)=-4484\mathrm{}\left(2\right)\mathrm{}$ Mc/sec; $I\left(115m\right)=\frac{11}{2}$, $A\left(115m\right)=-657.6\mathrm{}\left(6\right)\mathrm{}$ Mc/sec, $B\left(115m\right)=+131\mathrm{}\left(6\right)\mathrm{}$ Mc/sec. If nuclear structure and quadrupole shielding effects are neglected, the corresponding nuclear moments are: $\mu \mathrm{}\left(115\right)=-0.6469\mathrm{}\left(3\right)\mathrm{}{\mu }_N$, $\mu \mathrm{}\left(115m\right)=-1.0437\mathrm{}\left(10\right)\mathrm{}{\mu }_N$, $Q\left(115m\right)=-0.61\mathrm{}\left(8\right)\mathrm{}$ b. The ratio of the ${\mathrm{Cd}}^{115m}$ and ${\mathrm{Cd}}^{109}$ quadrupole moments is $\frac{Q\left(115m\right)\mathrm{}}{Q\left(109\right)\mathrm{}}=-0.79\mathrm{}\left(3\right)\mathrm{}$; this result is independent of shielding corrections. The ${\mathrm{Cd}}^{115}$ nuclear moment is compared with the moment predicted for a ${\left(3\mathrm{}{s}_{\frac{1}{2}}\right)}^1{\left(1\mathrm{}{h}_{\frac{11}{2}}\right)}^2$ neutron assignment with configuration mixing. The ${\mathrm{Cd}}^{115m}$ moment is compared with the moments predicted for both a ${\left(3\mathrm{}{s}_{\frac{1}{2}}\right)}^0{\left(1\mathrm{}{h}_{\frac{11}{2}}\right)}^3$ and a