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en 1990 Douglas Patrick Wells elastic photon scattering Helium-4 (4He) tagged photons nuclear giant resonances electromagnetic polarizabilities Elastic photon scattering from 4He between 23 and 73 MeV Dissertation / Thesis text Eisenstein, Robert A. Wells, Douglas Patrick 2011-06-01T17:28:53Z 2011-06-01T17:28:53Z 10000-01-01 1990 Elastic photon scattering cross sections were measured for 4He at 45 and 135 degrees. These measurements were performed at energies between 23 and 73 MeV using the University of Illinois tagged photon facility. The principal contributions to the scattering in this energy range are the nuclear giant resonances at lower energies and the coherent scattering from bound nucleons and nucleon pairs at higher energies. The data collected in this experiment place constraints on the peak photoabsorption of the giant dipole resonance, which has been in dispute, and place limits on the electromagnetic polarizabilities of the bound nucleon in 4He. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-01T17:28:53Z No. of bitstreams: 1 1990_wells.pdf: 2908264 bytes, checksum: 276b453a7bd32cb969cdb31e7aa99791 (MD5) Made available in DSpace on 2011-06-01T17:28:53Z (GMT). No. of bitstreams: 1 1990_wells.pdf: 2908264 bytes, checksum: 276b453a7bd32cb969cdb31e7aa99791 (MD5) Previous issue date: 1990 Restriction data tranferred 2014-07-01T11:14:03-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-06-01T17:28:53Z Item is restricted indefinitely. Thesis U of I Only 3480343 http://hdl.handle.net/2142/25208 Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.