The structure of 209Bi: (I). Microscopic structure from analog resonances |
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Authors: | TP Cleary Nelson Stein PR Maurenzig |
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Institution: | Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520USA |
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Abstract: | Excitation functions for the 209Bi(p, p′) reaction have been measured for incident proton energies from 14.0 to 15.5 MeV to study the population of states in 209Bi via decay of the isobaric analog resonances in the compound nucleus 210Po. The analogs correspond to parent states in the lowest one MeV of excitation in 210Bi. Strong resonances are observed in the excitation functions for twenty proton groups corresponding to levels between 2.75 and 3.65 MeV in 209Bi. From these results, levels which possess microscopic 2p-1h structure involving the orbitals are identified and their 210Bi parentage determined. The resonant scattering results together with other direct inelastic scattering data allow the spins and parities for many of the levels to be deduced. The results of a microscopic calculation, in which empirical two-body matrix elements are employed to describe the interactions between the orbitals, are also reported and compared with the experimental results for levels in 209Bi. The excellent agreement between theory and experiment demonstrates that the general character of these levels can be understood microscopically in terms of their 2p-1h structure. |
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Keywords: | Nuclear Reactions |
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