Nuclear Structure ofSr88andSr89

A theoretical study of the positive-parity states in ${\mathrm{Sr}}^{88}$ and ${\mathrm{Sr}}^{89}$ has been performed using phenomenological two-body matrix elements. In ${\mathrm{Sr}}^{88}$, two uncoupled spaces were considered. In the first, the $p_{\frac{1}{2}}$, $p_{\frac{3}{2}}$, $f_{\frac{5}{2}}$, and $f_{\frac{7}{2}}$, proton orbitals were used to describe the possible excitations. In the second, neutron-neutron-hole states were calculated. Positive-parity levels in ${\mathrm{Sr}}^{89}$ were calculated using configurations formed by the coupling of one neutron to the proton states discussed above. The configurational makeup of the ground state, the $E2\mathrm{}$ transition rate of the 1.85-MeV level, and other structure properties are discussed for ${\mathrm{Sr}}^{88}$. Spectra, stripping and nonstripping levels, and ($p, p^{\prime }$) and ($p, {\gamma }_0$) analog-state reactions are considered in the ${\mathrm{Sr}}^{89}$ model.