Exploring the multihumped fission barrier of 238U via sub-barrier photofission

L. Csige, D. M. Filipescu, T. Glodariu, J. Gulyás, M. M. Günther, D. Habs, H. J. Karwowski, A. Krasznahorkay, G. C. Rich, M. Sin, L. Stroe, O. Tesileanu, and P. G. Thirolf
Phys. Rev. C 87, 044321 – Published 15 April 2013


The photofission cross section of 238U was measured at sub-barrier energies as a function of the γ-ray energy using a monochromatic, high-brilliance, Compton-backscattered γ-ray beam. The experiment was performed at the High Intensity γ-ray Source (HIγS) facility at beam energies between Eγ=4.7 MeV and 6.0 MeV and with 3% energy resolution. Indications of transmission resonances have been observed at γ-ray beam energies of Eγ=5.1 MeV and 5.6 MeV with moderate amplitudes. The triple-humped fission barrier parameters of 238U have been determined by fitting empire-3.1 nuclear reaction code calculations to the experimental photofission cross section.

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  • Received 10 February 2013


©2013 American Physical Society

Authors & Affiliations

L. Csige1,2,3, D. M. Filipescu4, T. Glodariu4, J. Gulyás3, M. M. Günther5, D. Habs5, H. J. Karwowski6,7, A. Krasznahorkay3, G. C. Rich6,7, M. Sin4, L. Stroe4, O. Tesileanu4, and P. G. Thirolf1

  • 1Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
  • 2Excellence Cluster Universe, D-85748 Garching, Germany
  • 3Institute of Nuclear Research, Hungarian Academy of Sciences (MTA Atomki), Post Office Box 51, H-4001 Debrecen, Hungary
  • 4H. Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
  • 5Max-Planck-Institute for Quantum Optics, D-85748 Garching, Germany
  • 6Department of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599, USA
  • 7Triangle Universities Nuclear Laboratory (TUNL), Durham, North Carolina 27708, USA

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Vol. 87, Iss. 4 — April 2013

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