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Papanicolas, Costas N. Ammons, Edsel Albert 2011-05-04T18:42:22Z 2011-05-04T18:42:22Z 10000-01-01 1992 We report here on progress toward utilization of the ( e, e'1) reaction for the study of giant resonances. The reaction mechanism of this purely leptonic probe is known since it is governed by quantum electrodynamics. Because the long wavelength approximation is applicable, for the emitted photon, the ( e, e'1) reaction is highly selective of the multi polarity of the giant resonance response. However, the small photon-emission probability of the giant resonances, their broad nature, and competition from bremsstrahlung photons, have suggested that use of the ( e, e'1) reaction in the study of the giant resonances would be very difficult. In a series of experiments at the Nuclear Physics Laboratory of the University of Illinois, utilizing a 100 MeV electron beam provided by the MUSL-2 microtron, measurements on 12C have demonstrated the feasibility of the (e,e'1) probe of the giant resonance region. Measurements were taken at momentum transfers of .32 fm-1 and .46 fm-1 for excitation energies covering the 13 to 30 MeV region. By forming missing energy spectra, cross sections, both differential and integrated over the giant resonance region, were obtained for (e, e'1) in which the nucleus exits in the ground state or in one of the first two excited states at 4.44 MeV and 7.65 MeV. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-04T18:42:22Z No. of bitstreams: 1 1992_Ammons.pdf: 2068876 bytes, checksum: 4af5184c67bdac7853e2709443648b9a (MD5) Made available in DSpace on 2011-05-04T18:42:22Z (GMT). No. of bitstreams: 1 1992_Ammons.pdf: 2068876 bytes, checksum: 4af5184c67bdac7853e2709443648b9a (MD5) Previous issue date: 1992 Restriction data tranferred 2014-07-01T11:12:19-05:00 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 2011-05-04T18:42:22Z Item is restricted indefinitely. Thesis U of I Only 3490552 http://hdl.handle.net/2142/18909 en 1992 Edsel Albert Ammons giant resonance quantum electrodynamics leptonic probe Investigation of the giant resonance region of 1̳2̳C with (e,e'[gamma]) Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.