Clustering effects in a microscopic four-α description of the α+12C system

P. Descouvemont
Phys. Rev. C 44, 306 – Published 1 July 1991
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Abstract

The α+12C system is investigated in the generator coordinate method, where the C12 nucleus is described by three α particles located on the apexes of an equilateral triangle. The C12 wave functions are projected out on the 0+ and 2+ states. By modifying the size of the triangle, we analyze the importance of clustering effects in C12 on O16 bound states, and on α+12C phase shifts. These effects are found to be reduced when the total spin of the α+12C system increases. The coupling between the α+12C(0+) and α+12C(2+) channels also decreases when α clustering is introduced in C12. We obtain high-energy resonances in the α+12C scattering. These resonances, located between 15 and 30 MeV in the center of mass, are suggested to be Pauli resonances, analog to the well-known forbidden states in the two-cluster model.

  • Received 26 December 1990

DOI:https://doi.org/10.1103/PhysRevC.44.306

©1991 American Physical Society

Authors & Affiliations

P. Descouvemont

  • Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, Campus Plaine, Code Postal 229-B1050 Bruxelles, Belgium

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Vol. 44, Iss. 1 — July 1991

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