Bulk properties of iron isotopes
- Michigan State University, NSCL (United States)
- Ohio University, Department of Physics and Astronomy (United States)
- North Carolina State University (United States)
- HAS, Institute of Isotope and Surface Chemistry (Hungary)
- Lawrence Livermore National Laboratory (United States)
- University of Oslo, Department of Physics (Norway)
- San Diego State University (United States)
Nuclear level densities and radiative strength functions (RSFs) in {sup 56}Fe and {sup 57}Fe were measured using the {sup 57}Fe({sup 3}He, {alpha}{gamma}) and {sup 57}Fe({sup 3}He, {sup 3}He'{gamma}) reactions, respectively, at the Oslo Cyclotron Laboratory. A low-energy enhancement in the RSF below 4-MeV energy was observed. This finding cannot be explained by common theoretical models. In a second experiment, two-step cascade intensities with soft primary transitions from the {sup 56}Fe(n, 2{gamma}) reaction were measured. The agreement between the two experiments confirms the low-energy enhancement in the RSFs. In a third experiment, the neutron evaporation spectrum from the {sup 55}Mn(d, n){sup 56}Fe reaction was measured at 7-MeV deuteron energy at the John Edwards Accelerator Laboratory at Ohio University. Comparison of the level density of {sup 56}Fe obtained from the first and third experiments gives an overall good agreement. Furthermore, observed enhancement for soft {gamma} rays is strengthened by the last experiment.
- OSTI ID:
- 21077616
- Journal Information:
- Physics of Atomic Nuclei, Vol. 70, Issue 9; Other Information: DOI: 10.1134/S1063778807090232; Copyright (c) 2007 Nauka/Interperiodica; Article Copyright (c) 2007 Pleiades Publishing, Ltd; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7788
- Country of Publication:
- United States
- Language:
- English
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