Neutron ${d_{\frac{5}{2}}}^{n}$ Configurations in Zr Isotopes

Energy levels of neutron

2 {d_{\frac{5}{2}}}^{n}

configurations are analyzed by shell model methods. Good agreement is obtained between experimental and calculated energies. The position of the

\frac{3}{2^{+}}

level in

{Zr}^{93}

is predicted on the basis of this analysis. The energies of these configurations to which a

2 p_{\frac{1}{2}}

is added (in Y isotopes) are also considered by using a closed formula for the energies of

j^{n} j^{'}

configurations, with

j^{'} = \frac{1}{2}

, derived in the Appendix.

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Neutrond52nConfigurations in Zr Isotopes