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10000-01-01 Pandharipande, V.R. Forest, Jun L. 2012-05-07T19:43:21Z 2012-05-07T19:43:21Z 1998 This work is divided into two parts. In the first part, short-range structure of deuteron is studied using a nonrelativistic Hamiltonian. The equidensity surfaces for spin projection Ms=O distributions are found to be toroidal in shape, while those of Ms=±1 have dumbbell shapes at large density. The toroidal shapes indicate that the tensor correlations have near maximal strength at the interparticle distance r < 2 fm. They provide new insights and simple explanations of the structure and electromagnetic form factors of the deuteron. In the second part, relativistic effects are studied using a relativistic Hamiltonian defined as the sum of relativistic one-body kinetic energy, two- and three-body potentials and their boost corrections. Variational Monte Carlo method is used to study two kinds of relativistic effects in the binding energy of 3H and 4He. The first is due to the nonlocalities in the relativistic kinetic energy and relativistic one-pion exchange potential (OPEP), and the second is from boost interaction. The OPEP contribution is reduced by rv 15% by the relativistic nonlocality, which may also have significant effects on pion exchange currents. However, almost all of this reduction is canceled by changes in the kinetic energy and other interaction terms, and the total effect of the nonlocalities on the binding energy is very small. The boost interactions, on the other hand, give repulsive contributions of ~ 0.4 (1.9) MeV in 3H (4He) and account for ~ 1/3 of the phenomenological part of the three-nucleon interaction needed in the nonrelativistic Hamiltonians. Submitted by Megan Hayes (mohayes2@illinois.edu) on 2012-05-07T19:43:21Z No. of bitstreams: 1 1998_forest_j.pdf: 2917106 bytes, checksum: 63f1987f4adf13ea0ed5fc5a91da127a (MD5) Made available in DSpace on 2012-05-07T19:43:21Z (GMT). No. of bitstreams: 1 1998_forest_j.pdf: 2917106 bytes, checksum: 63f1987f4adf13ea0ed5fc5a91da127a (MD5) Previous issue date: 1998 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Megan Hayes (mohayes2@illinois.edu) on 2012-05-07T19:43:21Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:34:52-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: thesis thesis U of I Only 4120441 http://hdl.handle.net/2142/30812 en ©1998 Jun L. Forest Hamiltonians, deuteron, physics Relativistic Hamiltonians and short range structure of nuclei Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.