Electroweak Structure of Three-and Four-Body Nuclei

<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 ³He (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 ^<em>v</em>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 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 <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>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date.available

2000

Author dc:creator

• Marcucci, Laura Elisa

Contributors dc:contributor

• Rocco Schiavilla
• Mark Havey
• Sebastian Kuhn
• Anatoly Radyushkin
• Nancy Xu

• Electroweak structure
• Helium-3
• Multi-body problems
• Proton weak capture
• Nuclear

Statement dc:rights

• <p>In Copyright. URI: <a href="http://rightsstatements.org/vocab/InC/1.0/">http://rightsstatements.org/vocab/InC/1.0/</a> 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).</p>

Identifier

9780599754652

OAI identifier oai:identifier

oai:digitalcommons.odu.edu:physics_etds-1062