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Stahl, K.; Wendt, A.; Reiter, P.; Rudolph, D.; Blazhev, A.; Bruyneel, B.; Eberth, J.; Fahlander, C.; Fransen, C.; Golubev, P.; Hess, H.; Hoischen, R.; Holler, A.; Kalkühler, M.; Kotthaus, T.; Lersch, D.; Pascovici, G.; Seidlitz, M.; Siebeck, B.; Taprogge, J.; Warr, N.; Wiens, A.; Zell, O.
The European physical journal. A, Hadrons and nuclei, 01/2020, Letnik: 56, Številka: 1Journal Article
Several experiments were conducted at the 10 MV Van-de-Graaff tandem accelerator at the Institute of Nuclear Physics, Cologne, to detect proton emission from the isomeric 6457-keV 10 + state in 54 Ni . Excitation functions for two fusion–evaporation reactions were measured to maximise the population of the rare two-neutron evaporation channel from a 56 Ni compound nucleus. The search for delayed proton emission was based on the 28 Si ( 28 Si , 2 n ) 54 Ni reaction at a beam energy of 70 MeV. For this reaction, a cross-section limit for the population of the 10 + state in 54 Ni and its proton-decay branch was determined to be σ < 22 nb.
