Observation of low-lying resonances in the quasicontinuum of 195,196Pt and enhanced astrophysical reaction rates

• Published in: EPJ Web of conferences Vol. 93; p. 01039
• Main Authors: Giacoppo, F, Bello Garrote, F L, Eriksen, T K, Görgen, A, Guttormsen, M, Hagen, T W, Larsen, A C, Kheswa, B V, Klintefjord, M, Koehler, P E, Moretto, L G, Nyhus, H T, Renstrøm, T, Sahin, E, Siem, S, Tornyi, T G
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Les Ulis EDP Sciences 01-01-2015
• Subjects: Absorption cross sections; Capture (nuclear); Cross sections; Density; Formations; Isotopes; Mathematical analysis; Nuclear capture; NUCLEAR PHYSICS AND RADIATION PHYSICS; Platinum; Strength
• ISBN: 9782759817948; 2759817946
• ISSN: 2101-6275; 2100-014X; 2100-014X
• DOI: 10.1051/epjconf/20159301039

An excess of strength on the low-energy tail of the giant dipole resonance recently has been observed in the γ-decay from the quasicontinuum of 195,196Pt. The nature of this phenomenon is not yet fully investigated. If this feature is present also in the γ-ray strength of the neutron-rich isotopes, it can affect the neutron-capture reactions involved in the formation of heavy-elements in stellar nucleosynthesis. The experimental level density and γ-ray strength function of 195,196Pt are presented together with preliminary calculations of the corresponding neutron-capture cross sections.