
%0 Journal Article
%A A Hassan, Mohamed 
%A EA Awd-Allah, Hamed 
%A SA Hassan, Samia 
%A MA Tag El-Din, Ibrahim 
%T Phase Variation Effect on Proton&#8211;Nucleus Elastic Scattering
%J Australian Journal of Physics
%D 1996/06/01
%V 49
%N 3
%P 655-668
%K 
%R https://doi.org/10.1071/PH960655
%U https://www.publish.csiro.au/paper/PH960655 
%X Proton&#8211;deuteron elastic scattering at intermediate and high energies illustrates the importance of the phase variation of the nucleon&#8211;nucleon elastic scattering amplitude as in previous work. Two kinds of phase variation are examined. The first is the usual one which is related to free nucleon-free nucleon collisions as suggested by Franco. The second is assumed to be related to the time ordering of multi-scattering processes. The two kinds play similar roles in improving the results. The contributions of both kinds lead to a good fit to the experimental data at the energies considered. The value of the phase variation parameter in each kind (where they are considered together), which gives a good fit to the experimental data, are approximately the same and of order 4 (GeV / c)&#8254; 2. Also, with relatively small values of the phase variation parameter, the phase variation effect improves the agreement with the experimental data for the p&#8211;4He elastic scattering differential cross section at the minimum region in the energy range 97&#8211;393 GeV. 
