Calculation of the complete Glauber amplitude for p+6He scattering Original Research Article

A method for calculating the complete expansion of the Glauber amplitude is applied to the elastic scattering of protons on a 6He target using correlated wave functions. The angular distribution measured at Tp = 700 MeV is very well reproduced by a no parameter calculation using a fully microscopic, 6-nucleon α + n + n-cluster wave function. The accuracy of various approximations for the Glauber amplitude is compared with the complete expansion calculation. The matter radius of 6He consistent with the analysis is 2.51 fm. Simple shell-model or di-neutron cluster-model wave functions fail in reproducing the angular distribution.