First evidence of low energy enhancement in Ge isotopes

• Published in: EPJ Web of conferences Vol. 93; p. 4003
• Main Authors: Renstrøm, T., Nyhus, H.-T., Utsunomiya, H., Larsen, A. C., Siem, S., Guttormsen, M., Filipescu, D. M., Gheorghe, I., Goriely, S., Bernstein, L. A., Bleuel, D. L., Glodariu, T., Görgen, A., Hagen, T. W., Lui, Y.-W., Negi, D., Ruud, I. E., Şahin, E., Schwengner, R., Shima, T., Takahisa, K., Tesileanu, O., Tornyi, T. G., Tveten, G. M., Wiedeking, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01-01-2015
• Subjects: Covering; Density; Germanium; Isotopes; Low energy; Photoneutrons; Separation; Strength; Thresholds
• ISBN: 9782759817948; 2759817946
• ISSN: 2100-014X; 2101-6275; 2100-014X
• DOI: 10.1051/epjconf/20159304003

The γ-strength functions and level densities of 73,74Ge have been extracted from particle-γ coincidence data using the Oslo method. In addition the γ-strength function of 74Ge above the neutron separation threshold, Sn = 10.196 MeV has been extracted from photoneutron measurements. When combined, these two experiments give a γ-strength function covering the energy range of ∼1-13 MeV for 74Ge. This thorough investigation of 74Ge is a part of an international campaign to study the previously reported low energy enhancement in this mass region in the γ-strength function from ∼3MeV towards lower γ energies. The obtained data show that both 73,74Ge display an increase in strength at low γ energies.