Level density of 56Fe 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, S. Siem
Abstract
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 first discovered by the Oslo method in iron and molybdenum isotopes.
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