Elsevier

Nuclear Physics A

Volume 278, Issue 2, 7 March 1977, Pages 261-284
Nuclear Physics A

Electroexcitation of giant resonances in 181Ta☆

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Abstract

The giant resonance region of 181Ta has been investigated by means of inelastic electron scattering, with primary electron energies of 79.1 to 118.3 MeV. A peak-fitting procedure was employed to separate the measured spectrum into nine different resonance components. Multipolarity and strength assignments were deduced using DWBA analysis with the Goldhaber-Teller and Steinwedel-Jensen models. In addition to the well-known giant dipole structure, other resonances were identified at 23.2 ± 0.3 MeV (E2), 9.5 ± 0.2 and 11.5 ± 0.2 MeV (E2 or EO), 19.5 ± 0.8 MeV (E3), 3.70 ± 0.14 MeV (E3 or E4), and 5.40 ± 0.15 MeV (E4 or E5). The model dependence of the analysis is discussed.

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    ☆

    Work supported by the Atomic Energy Control Board of Canada and the National Research Council of Canada.

    ††

    Present address: Institut voor Kernphysisch Onderzoek, Postbus 4395, Amsterdam 1006, The Netherlands.

    †††

    Present address: High Energy Physics Division, Argonne National Laboratory, Argonne, Iliionis 60439, USA.

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