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Title:Elastic photon scattering in 208Pb and 206Pb
Author(s):Starr, Richard Douglas
Doctoral Committee Chair(s):Axel, P.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):elastic photon scattering
lead isotopes
photoabsorption
giant magnetic dipole resonance
Abstract:Average elastic photon scattering cross sections were measured for 208Pb and 206Pb between 9.5 MeV and 12.0 MeV. The results indicate that there is a significant amount of fine structure in the photoabsorption cross section in 208pb in this energy region, but that 206pb has little or no fine structure. Three concentrations of strength in 208pb at 10.04, 10.60, and 11.27 MeV have been found to be mainly dipole. This is in disagreement with recent inelastic electron scattering results which claim that this strength is E2. Finally, the parity of the 7.06 MeV level in 208pb was measured . pane-polar1zed photons and was found to be Jpi = 1-. This using pions = contradicts an earlier, tentative assignment of Jpi = 1+, which implied that the 7.06 level was an important part of the giant magnetic dipole resonance 1n 208Pb.
Issue Date:1979
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/25578
Rights Information:1979 Richard Douglas Starr
Date Available in IDEALS:2011-06-29
Identifier in Online Catalog:358274


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