Level density of 56 Fe and low - energy enhancement of γ - strength function

A. V. Voinov,1,∗ S. M. Grimes,1 U. Agvaanluvsan,2 E. Algin,3 T. Belgya,4 C. R. Brune,1 M. Guttormsen,5 M. J. Hornish,1 T. Massey,1 G. E. Mitchell,6,7 J. Rekstad,5 A. Schiller,8 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 (Received 6 April 2006; published 26 July 2006)