Nuclear Matter Distributions in6Heand8Hefrom Small Anglep-He Scattering in Inverse Kinematics at Intermediate Energy

p+6,8He elastic scattering at intermediate energies

“…(3) and (4), agree well with the experimental data in the range of very low values of the momentum transfer but, as this quantity increases, they deviate from the experimental data in form and absolute values. These results are very similar to those obtained for p+ 4 He elastic scattering.…”

“…With a modifi ed Woods-Saxon parametrization for the Dirac optical potential, with different sets of parameters at each energy, they obtained very impressive fi ts to the experimental data. However, nuclear structure calculations demonstrate that the nuclear densities of 4 He have a radial dependence f (r) which is very nearly Gaussian. Based on this physical evidence we have therefore chosen a Gaussian parametrization of the form factor [15] to fi t the experimental data for p+ 4 He elastic scattering at intermediate energies and we have restricted our attention to energies near those at which experimental data for p+ 6,8 He elastic scattering exists, viewing an extrapolation of our global parameters to these latter cases.…”

“…In the late seventies, Arnold, Clark and Mercer [9] measured angular distributions and polarizations for p+ 4 He elastic scattering at intermediate energies, from 0.561 to 1.73 GeV. With a modifi ed Woods-Saxon parametrization for the Dirac optical potential, with different sets of parameters at each energy, they obtained very impressive fi ts to the experimental data.…”

“…Recently, it has also been used extensively to determine the extension of the nuclear matter density of exotic nuclei. In particular, in a recent set of experiments, performed at GSI, inverse kinematics were used to study the elastic scattering of p+ 4,6,8 He and determine their matter densities [4,5,6]. On the theoretical side, elastic scattering at intermediate energies can be calculated using either non-relativistic approaches as done in Refs.…”

“…In a previous work [15] we have used a relativistic nuclear optical potential, constructed from a Lorentz scalar, V s , and the time-like component of the four-vector potential, V 0 , with Gaussian form factors to calculate elastic scattering angular distributions and analyzing powers for p+ 4 He at intermediate energies, comparing the results with a RIA calculation. Motivated by the quality of our results, we have extended the optical potential parameters obtained in that case in order to calculate angular distributions and polarizations for the elastic scattering of p+ 6,8 He.…”