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Phys. Rev. C 74, 014314 (2006) [6 pages]

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

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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

Received 6 April 2006; published 26 July 2006

The 55Mn(d,n)56Fe differential cross section is measured at Ed=7 MeV. The 56Fe level density obtained from neutron evaporation spectra is compared to the level density extracted from the 57Fe(3He, αγ)56Fe 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 56Fe 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.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.74.014314
DOI:
10.1103/PhysRevC.74.014314
PACS:
21.10.Ma, 24.60.Dr, 25.70.Gh, 21.10.Pc

*Electronic address: voinov@ohio.edu

 
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