Breakup of 12C Resonances into Three alfa Particles Articles uri icon

authors

  • KIRSEBOM, O. S.
  • ALCORTA, M.
  • BORGE, M. J. G.
  • CUBERO, M.
  • DIGET, C. A.
  • DOMINGUEZ REYES, RICARDO
  • FRAILE, L.M.
  • FULTON, B. R.
  • FYNBO, H. O. U.
  • HYLDEGAARD, S.
  • JONSON, B.
  • MADURGA, M.
  • MUÑOZ MARTIN, A
  • NILSSON, T.
  • NYMAN, G.
  • PEREA, A.
  • RIISAGER, K.
  • TENGBLAD, O.

publication date

  • June 2010

start page

  • 64313

issue

  • 6

volume

  • 81

International Standard Serial Number (ISSN)

  • 0556-2813

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

abstract

  • The reaction 3He+11B→d+12C* has been used to populate resonances in 12C up to an excitation energy of 15 MeV. The subsequent breakup to three alfa particles has been measured in complete kinematics. Dalitz plots are used to visualize and analyze the data. The Dalitz plot intensity distribution exhibits zero points characteristic of the total spin and parity of the 3alfa system allowing us to determine the spin and parity of a state in 12C at 13.35 MeV whose quantum numbers were hitherto not well established. The Dalitz plot intensity distributions of the 2- state at 11.83 MeV and the 1+ state at 12.71 MeV are compared with the predictions of a recent three-body calculation as well as with simpler models. All are able to reproduce the gross structures seen in the Dalitz plot, but none give an accurate description of the detailed profile of the distributions.