Level density of Fe56 and low-energy enhancement of γ-strength function

A. V. Voinov, S. M. Grimes, U. Agvaanluvsan, E. Algin, T. Belgya, C. R. Brune, M. Guttormsen, M. J. Hornish, T. Massey, G. E. Mitchell, J. Rekstad, A. Schiller, and S. Siem
Phys. Rev. C 74, 014314 – Published 26 July 2006

Abstract

The Mn55(d,n)Fe56 differential cross section is measured at Ed=7 MeV. The Fe56 level density obtained from neutron evaporation spectra is compared to the level density extracted from the Fe57(He3, αγ)Fe56 reaction by the Oslo-type technique. Good agreement is found between the level densities determined by the two methods. With the level density function obtained from the neutron evaporation spectra, the Fe56 γ-strength function is also determined from the first-generation γ matrix of the Oslo experiment. The good agreement between the past and present results for the γ-strength function supports the validity of both methods and is consistent with the low-energy enhancement of the γ strength below ~4 MeV that was first discovered by the Oslo method in iron and molybdenum isotopes.

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  • Received 6 April 2006

DOI:https://doi.org/10.1103/PhysRevC.74.014314

©2006 American Physical Society

Authors & Affiliations

A. V. Voinov1,*, S. M. Grimes1, U. Agvaanluvsan2, E. Algin3, T. Belgya4, C. R. Brune1, M. Guttormsen5, M. J. Hornish1, T. Massey1, G. E. Mitchell6,7, J. Rekstad5, A. Schiller8, and S. Siem5

  • 1Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
  • 2Lawrence Livermore National Laboratory, L-414, 7000 East Avenue, Livermore, California 94551, USA
  • 3Department of Physics, Eskisehir Osmangazi University, Meselik, Eskisehir 26480, Turkey
  • 4Institute of Isotope and Surface Chemistry, Chemical Research Centre HAS, P.O. Box 77, H-1525 Budapest, Hungary
  • 5Department of Physics, University of Oslo, N-0316 Oslo, Norway
  • 6North Carolina State University, Raleigh, North Carolina 27695, USA
  • 7Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
  • 8NSCL, Michigan State University, East Lansing, Michigan 48824, USA

  • *Electronic address: voinov@ohio.edu

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Vol. 74, Iss. 1 — July 2006

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