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, H. F. Wirth

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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*=4.0-6.4 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.

Original languageEnglish
Article number011301
JournalPhysical Review C - Nuclear Physics
Volume80
Issue number1
DOIs
Publication statusPublished - aug. 6 2009

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Csige, L., Csatlós, M., Faestermann, T., Gácsi, Z., Gulyás, J., Habs, D., Hertenberger, R., Krasznahorkay, A., Lutter, R., Maier, H. J., Thirolf, P. G., & Wirth, H. F. (2009). Hyperdeformed sub-barrier fission resonances observed in U232. Physical Review C - Nuclear Physics, 80(1), [011301]. https://doi.org/10.1103/PhysRevC.80.011301