Bulk properties of iron isotopes


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Algin E., Schiller A., Voinov A., Agvaanluvsan U., Belgya T., Bernstein L. A., ...Daha Fazla

PHYSICS OF ATOMIC NUCLEI, cilt.70, sa.9, ss.1634-1639, 2007 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 70 Sayı: 9
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1134/s1063778807090232
  • Dergi Adı: PHYSICS OF ATOMIC NUCLEI
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1634-1639
  • Eskişehir Osmangazi Üniversitesi Adresli: Hayır

Özet

Nuclear level densities and radiative strength functions (RSFs) in Fe-56 and Fe-57 were measured using the Fe-57(He-3, alpha gamma) and Fe-57(He-3, He-3'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 Fe-56(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 Mn-55(d, n)Fe-56 reaction was measured at 7-MeV deuteron energy at the John Edwards Accelerator Laboratory at Ohio University. Comparison of the level density of Fe-56 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.