p+4,6,8He elastic scattering at intermediate energies

Using a relativistic nuclear optical potential consisting of a Lorentz scalar, V-S, and the time-like component of a four-vector potential, V-0, with a Gaussian form factor, we have calculated elastic scattering differential cross-sections and polarizations for p + He-4 at intermediate energies for which experimental data are available. We have extended our calculations in order to obtain the differential cross sections for p + He-6,He-8 elastic scattering at these energies. We compare our results with those of the relativistic impulse approximation (RIA) and with the available experimental data in the range of 0 less than or equal to t less than or equal to 0.22 (GeV/c)(2). (C) 2003 Elsevier B.V. All rights reserved.