Treatment of total reaction cross section for proton and antiproton scattering from 3He

Abstract EN

Within the framework of optical limit approximation (OLA) of Glauber multiple scattering model (GMSM), the total reaction cross section σR for proton and antiproton scattering from the target nucleus 3He at incident energies, 18 < Ep ≤ 1000 MeV and 19 < < 1100 MeV, are calculated.

A model wave function with the effect of three-body force, harmonic oscillator and a Gaussian forms are used to describe the ground state density distribution of 3He.

The parameters of hadron-nucleon elastic scattering amplitude are taken to be both free and nuclear in-medium parameters.

Introducing the phase variation parameter in conjunction with free, in-medium hadron –nucleon parameter, and with higher order momentum transfer components led to a satisfactory agreement with the available experimental data in case of p-3He for18 < Ep < 50 MeV.

In addition, it is found that the effects of both Pauli blocking and the geometrical law with effective proton-nucleon total cross-section play a s ignificant role in de s cribing σR at this range of proton energy.

On the othe r hand, a more accurate re s ult for σR in case of at the only existing experimental data is obtained by invoking the phase variation parameter with free parameters of elastic scattering amplitude.

p E 3 p He p E 19.6MeVp nucleon