Angular distributions for the elastic scattering of ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$ by ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$ at 494, 510, and 718 MeV have been measured. Fresnel, parametrized phase shift, and optical model analyses show that Coulomb deflection and surface absorption effects dominate. The optical model analysis shows that the results are sensitive to the nuclear potential only in the vicinity of the strong absorption radius, giving a value of the nuclear potential at this distance that is in agreement with a number of theoretical estimates.

NUCLEAR REACTIONS ${}_{}{}^{208}{}_{}{}^{}\mathrm{Pb}$(${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$, ${}_{}{}^{84}{}_{}{}^{}\mathrm{Kr}$), $E=494, 510, \mathrm{and} 718$ MeV; measured $\sigma \left(\theta \right)$; Fresnel, parametrized phase shift and optical model analyses.

• Received 29 September 1975

DOI:https://doi.org/10.1103/PhysRevC.13.1893