Emergent collectivity in nuclei and enhanced proton-neutron interactions

D. Bonatsos, S. Karampagia, R. B. Cakirli, R. F. Casten, K. Blaum, and L. Amon Susam
Phys. Rev. C 88, 054309 – Published 13 November 2013

Abstract

Enhanced proton-neutron interactions occur in heavy nuclei along a trajectory of approximately equal numbers of valence protons and neutrons. This is also closely aligned with the trajectory of the saturation of quadrupole deformation. The origin of these enhanced p-n interactions is discussed in terms of spatial overlaps of proton and neutron wave functions that are orbit-dependent. It is suggested for the first time that nuclear collectivity is driven by synchronized filling of protons and neutrons with orbitals having parallel spins, identical orbital and total angular momenta projections, belonging to adjacent major shells and differing by one quantum of excitation along the z axis. These results may lead to a new approach to symmetry-based theoretical calculations for heavy nuclei.

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  • Received 13 May 2013

DOI:https://doi.org/10.1103/PhysRevC.88.054309

©2013 American Physical Society

Authors & Affiliations

D. Bonatsos1, S. Karampagia1, R. B. Cakirli2,3, R. F. Casten4, K. Blaum3, and L. Amon Susam2

  • 1Institute of Nuclear and Particle Physics, National Centre for Scientific Research Demokritos, GR-153 10 Aghia Paraskevi, Attiki, Greece
  • 2Department of Physics, University of Istanbul, Istanbul, Turkey
  • 3Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
  • 4Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520, USA

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Issue

Vol. 88, Iss. 5 — November 2013

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