Article,

El strength in N=82 nuclei

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Nuclear Physics A, (May 2003)17th International Nuclear Physics Divisional Conference of the European-Physical-Society, DEBRECEN, HUNGARY, SEP 30-OCT 04, 2002.
DOI: 10.1016/S0375-9474(03)00938-2

Abstract

Recently the importance of small contributions of electric dipole strength near the particle threshold to the production rates of atomic nuclei has become evident. Prior estimates concentrated on the Giant Dipole Resonance (GDR) which dominates photoabsorption in all nuclei. Extrapolations to smaller excitation energies were assumed to be sufficiently reliable. However, new measurements reveal that collective El strength can be found in the threshold region.

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