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.
","abstract_html":"<p>This work reports results for (i) the elastic electromagnetic form factors of the trinucleons; (ii) the nuclear response functions of interest in [<em>e</em> → <em>e'</em>] experiments, at excitation energies below the deuteron breakup threshold; (iii) the astrophysical <em>S</em>-factor for proton weak capture on <sup>3</sup>He (the <em>hep </em>reaction). The initial and final state wave functions are calculated using the correlated hyperspherical harmonics method, from a realistic Hamiltonian consisting of the Argonne <sup><em>v</em></sup>18 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 <sup>3</sup>H, charge form factors and static properties of both <sup>3</sup>H and <sup>3</sup>He, are in satisfactory agreement with the experimental data. However, the position of the zero in the magnetic form factor of <sup>3</sup>He is underpredicted by theory. The calculated nuclear response functions in <sup>3</sup>He electrodisintegration at threshold are in good agreement with the experimental data, which have however rather large errors. Finally, the astrophysical <em>S</em>-factor for the <em>hep</em> 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.</p>","abstract_has_math":false,"creators":["Marcucci, Laura Elisa"],"institution":null,"degree_name":"Doctor of Philosophy (PhD)","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Rocco Schiavilla","Mark Havey","Sebastian Kuhn","Anatoly Radyushkin","Nancy Xu"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000-07-01T07:00:00Z","date_published":"2000-07-01T07:00:00Z","updated_at":"2026-07-24T03:34:18Z","subjects":["Electroweak structure","Helium-3","Multi-body problems","Proton weak capture","Nuclear"],"languages":[],"rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
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"]},{"key":"dc:title","label":"Title","values":["Electroweak Structure of Three-and Four-Body Nuclei"]}]}],"canonical_facts":{"dc:contributor":["Rocco Schiavilla","Mark Havey","Sebastian Kuhn","Anatoly Radyushkin","Nancy Xu"],"dc:creator":["Marcucci, Laura Elisa"],"dc:date.available":["2019-02-21T08:00:00Z"],"dc:description.abstract":["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.
"],"dc:identifier":["9780599754652","https://digitalcommons.odu.edu/physics_etds/52"],"dc:rights":["In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
"],"dc:subject":["Electroweak structure","Helium-3","Multi-body problems","Proton weak capture","Nuclear"],"dc:title":["Electroweak Structure of Three-and Four-Body Nuclei"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Doctor of Philosophy (PhD)"]},"updated_at":"2026-07-24T03:34:18Z"}