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Coexistence of Covalent Superdeformation and Molecular Resonances in an Unbound Region of Be12

M. Ito, N. Itagaki, H. Sakurai, and K. Ikeda
Phys. Rev. Lett. 100, 182502 – Published 9 May 2008
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Abstract

The generalized two-center cluster model, which can treat static structures and dynamical reactions in excited states, is applied to the light neutron-rich system, Be12=α+α+4N. We discuss the change of the neutrons’ configuration around two α cores from the covalent structure to the ionic one. We show that, in the unbound region above particle-decay thresholds, the ionic configurations appear as the molecular resonances of α+He8, He6+He6, and He5+He7. A new type of superdeformation is possible, and we find here a covalent superdeformation with a hybrid configuration of both the covalent and ionic structures. The excitation of these exotic structures through the two-neutron transfer reaction is also discussed.

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  • Received 17 August 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.182502

©2008 American Physical Society

Authors & Affiliations

M. Ito1, N. Itagaki2, H. Sakurai1, and K. Ikeda1

  • 1RIKEN Nishina Center for Accelerator-Based Science, RIKEN, Wako, 351-0198, Saitama, Japan
  • 2Department of Physics, University of Tokyo, Hongo, 113-0033 Tokyo, Japan

See Also

Nuclear Chemistry

Don Monroe
Phys. Rev. Focus 22, 4 (2008)

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Issue

Vol. 100, Iss. 18 — 9 May 2008

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