TESTS OF 3He WAVE-FUNCTIONS VIA THE 3He(p,2p)d and 3He(p,2p)d REACTIONS

Abstract

This chapter describes the tests of 3 He wave functions via the 3 He(p,2p)d and 3 He(p,2p)d* reactions. Calculations of 3 He wave functions are usually tested by comparing them with the 3 He binding energy and the charge form factor derived from electron scattering. Both the variational calculations and the Faddeev equation calculations give similar results for these parameters. In the energy range between 35 and 155 MeV, the 3 He(p,2p)d and the 3 He(p,2p)d* reactions both show strong quasi-free p-p scattering. Comparison of these data with the plane wave impulse approximation indicates that this calculation can yield fairly good fits to the data if different normalization constants are used for different incident energies and for the d and d* final states. The calculation for the 3 He wave function is a variational calculation using the Hamada-Johnston nucleon-nucleon potential. Two different calculations are performed. First, in which all the wave function parameters are varied to yield the minimum binding energy. Second, a non-linear parameter that affects the tail of the S wave component is adjusted to fit the shape of the 3 He(p,2p)d data and then all the other parameters are left free to vary.