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Hyperdeformed sub-barrier fission resonances observed in U232

L. Csige, M. Csatlós, T. Faestermann, Z. Gácsi, J. Gulyás, D. Habs, R. Hertenberger, A. Krasznahorkay, R. Lutter, H. J. Maier, P. G. Thirolf, and H.-F. Wirth
Phys. Rev. C 80, 011301(R) – Published 2 July 2009

Abstract

The fission probability of U232 has been measured using the Pa231(He3,df) reaction with an energy resolution of 11 keV in the excitation energy region of E*=4.06.4 MeV. A number of sub-barrier fission resonances have been observed for the first time in the excitation energy range below E*=4.8 MeV and interpreted as rotational bands with a rotational parameter characteristic to a hyperdeformed nuclear shape (2/2Θ=1.96±0.11 keV). The angular distribution of the associated fission fragments was measured to deduce the K value of the rotational bands. The fission barrier parameters of U232 have been determined by analyzing the overall features of the fission probability. A deep third minimum with an excitation energy of EIII=3.2(2) MeV and rather low inner barrier height of EA=4.0(3) MeV could be established.

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  • Received 27 February 2009

DOI:https://doi.org/10.1103/PhysRevC.80.011301

©2009 American Physical Society

Authors & Affiliations

L. Csige1,2, M. Csatlós1, T. Faestermann3, Z. Gácsi1, J. Gulyás1, D. Habs2, R. Hertenberger2, A. Krasznahorkay1, R. Lutter2, H. J. Maier2, P. G. Thirolf2, and H.-F. Wirth3

  • 1Institute of Nuclear Research of the Hungarian Academy of Sciences (ATOMKI), Post Office Box 51, H-4001 Debrecen, Hungary
  • 2Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
  • 3Technische Universität München, D-85748 Garching, Germany

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Issue

Vol. 80, Iss. 1 — July 2009

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