First measurement of the B(E2;3/21/2) transition strength in Be7: Testing abinitio predictions for A=7 nuclei

S. L. Henderson, T. Ahn, M. A. Caprio, P. J. Fasano, A. Simon, W. Tan, P. O'Malley, J. Allen, D. W. Bardayan, D. Blankstein, B. Frentz, M. R. Hall, J. J. Kolata, A. E. McCoy, S. Moylan, C. S. Reingold, S. Y. Strauss, and R. O. Torres-Isea
Phys. Rev. C 99, 064320 – Published 18 June 2019
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Abstract

Electromagnetic observables are able to give insight into collective and emergent features in nuclei, including nuclear clustering. These observables also provide strong constraints for ab initio theory, but comparison of these observables between theory and experiment can be difficult due to the lack of convergence for relevant calculated values, such as E2 transition strengths. By comparing the ratios of E2 transition strengths for mirror transitions, we find that a wide range of ab initio calculations give robust and consistent predictions for this ratio. To experimentally test the validity of these ab initio predictions, we performed a Coulomb excitation experiment to measure the B(E2;3/21/2) transition strength in Be7 for the first time. A B(E2;3/21/2) value of 26(6)stat(3)syste2fm4 was deduced from the measured Coulomb excitation cross section. This result is used with the experimentally known Li7B(E2;3/21/2) value to provide an experimental ratio to compare with the ab initio predictions. Our experimental value is consistent with the theoretical ratios within 1σ uncertainty, giving experimental support for the value of these ratios. Further work in both theory and experiment can give insight into the robustness of these ratios and their physical meaning.

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  • Received 5 February 2019

DOI:https://doi.org/10.1103/PhysRevC.99.064320

©2019 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

S. L. Henderson1, T. Ahn1,*, M. A. Caprio2, P. J. Fasano2, A. Simon1, W. Tan1, P. O'Malley1, J. Allen1, D. W. Bardayan1, D. Blankstein1, B. Frentz1, M. R. Hall1, J. J. Kolata1, A. E. McCoy2,3, S. Moylan1, C. S. Reingold1, S. Y. Strauss1, and R. O. Torres-Isea4

  • 1Department of Physics and the Joint Institute for Nuclear Astrophysics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, USA
  • 2Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, Indiana 46556, USA
  • 3TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
  • 4Department of Physics, Randall Lab, 450 Church Street, University of Michigan, Ann Arbor, Michigan 48109, USA

  • *tan.ahn@nd.edu

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Issue

Vol. 99, Iss. 6 — June 2019

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