Date of Award
Doctor of Philosophy (PhD)
This work reports results for (i) the elastic electromagnetic form factors of the trinucleons; (ii) the nuclear response functions of interest in [e → e'] experiments, at excitation energies below the deuteron breakup threshold; (iii) the astrophysical S-factor for proton weak capture on 3He (the hep reaction). The initial and final state wave functions are calculated using the correlated hyperspherical harmonics method, from a realistic Hamiltonian consisting of the Argonne v18 two-nucleon and Urbana IX three-nucleon interactions. The nuclear electroweak charge and current operators include one- and many-body components. The predicted magnetic form factor of 3H, charge form factors and static properties of both 3H and 3He, are in satisfactory agreement with the experimental data. However, the position of the zero in the magnetic form factor of 3He is underpredicted by theory. The calculated nuclear response functions in 3He electrodisintegration at threshold are in good agreement with the experimental data, which have however rather large errors. Finally, the astrophysical S-factor for the hep reaction is predicted ≈ 4.5 larger than the value adopted in the standard-solar-model, with important consequences for the solar neutrino spectrum measured by the Super-Kamiokande collaboration.
Marcucci, Laura E..
"Electroweak Structure of Three-and Four-Body Nuclei"
(2000). Doctor of Philosophy (PhD), Dissertation, Physics, Old Dominion University, DOI: 10.25777/5n5r-7213