Differential cross sections for elastic and inelastic scattering of 12.0-MeV protons from ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ and ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$ have been measured. Optical-model parameters obtained from the elastic cross sections were used in distorted-wave-Born-approximation and coupled-channel calculations in order to determine the spin, parities, and deformation parameters of excited states. The deformation parameters found are ${\beta }_2=0.128\mathrm{} \mathrm{and} 0.108$ for the first $2^{+}$ states in ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ and ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$, respectively, and are ${\beta }_3=0.158\mathrm{} \mathrm{and} 0.145$, respectively, for the first $3^{-}$ states. Most of the scattering strength to the "two-phonon" states proceed through their one-phonon components. The spins of several higher excited states are suggested.

NUCLEAR REACTIONS ${}_{}{}^{84,86}{}_{}{}^{}\mathrm{Kr}(p,p^{\prime })$, $E=12.0\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$ and level energies; deduced optical-model parameters, $J^{\pi }$ and $\beta$ from DWBA and coupled channels.

• Received 24 June 1974

DOI:https://doi.org/10.1103/PhysRevC.10.2301