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Laszewski, R.M. Dale, Daniel Stanton 2011-04-27T15:07:33Z 2011-04-27T15:07:33Z 10000-01-01 1991 This experiment used highly polarized tagged photons to measure polarization asymmetries for elastic scattering in 208Pb in the energy region of the isovector giant quadrupole resonance (IVGQR). These measurements were performed at excitation energies between 16 and 30 MeV. Photons with enhanced linear polarization were obtained from an off-axis tagged photon beam by making a kinematic selection on the post-bremsstrahlung electrons. Scattered photons were detected in two large Nai(Tl) crystals. The polarization asymmetries clearly show the signature for interference between the isovector giant quadrupole resonance and the underlying electric dipole strength. The gross features of the IVGQR strength distribution were obtained in a relatively model independent manner. An isovector giant quadrupole resonance was observed at an excitation energy of 20.1±0.5 MeV, with a width of 6.3±0.5 MeV, and an energy weighted strength of 1.4±0.3 isovector sum rule units. Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-04-27T15:07:33Z No. of bitstreams: 1 1991_Dale.pdf: 1455809 bytes, checksum: a76bb4f6a04014636cc035c202c9f9a3 (MD5) Made available in DSpace on 2011-04-27T15:07:33Z (GMT). No. of bitstreams: 1 1991_Dale.pdf: 1455809 bytes, checksum: a76bb4f6a04014636cc035c202c9f9a3 (MD5) Previous issue date: 1991 Restriction data tranferred 2014-07-01T11:12:16-05:00 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 2011-04-27T15:07:33Z Item is restricted indefinitely. Thesis U of I Only 3476416 http://hdl.handle.net/2142/18887 en 1991 Daniel Stanton Dale isovector giant quadrupole resonance (IVGQR) Lead 208 (208Pb) elastic polarized photon scattering polarization asymmetries elastic scattering linear polarization Measurement of the isovector giant quadrupole resonance in 208Pb using eleastic polarized photon scattering Dissertation / Thesis text Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.