RT Journal Article T1 Direct and compound-nucleus reaction mechanisms in the 7Be + 58Ni system at near-barrier energies A1 Mazzocco, M. A1 Acosta Sánchez, Luis Armando A1 Martel Bravo, Ismael A1 Parkar, Vivek A1 Sánchez Benítez, Ángel Miguel A1 Zerva, K. AB The energy and angular distributions of 3He and 4He ions produced in the 7Be+58Ni reaction at a bombardingenergy of 22 MeV have been measured for the first time. The yield of the heavier helium isotope was four to fivetimes more abundant than that of its lighter counterpart, ruling out the possibility that in this energy range the7Be reaction dynamics is dominated by the exclusive breakup process 7Be → 3He + 4He (Sα= 1.586 MeV).Extensive kinematic and theoretical calculations suggest that the 3He ions mostly originate from the 4He-strippingprocess and the 4He production is mainly triggered by the fusion-evaporation channel. The role played by thebreakup, 3He-stripping, 1n-stripping, and 1n-pickup processes is also discussed. PB American Physical Society SN 0556-2813 SN 1089-490X (electrónico) YR 2015 FD 2015 LK http://hdl.handle.net/10272/11218 UL http://hdl.handle.net/10272/11218 LA eng NO Mazzocco, M., Acosta Sánchez, L.A., Martel Bravo, I., Parkar, V., Sánchez Benítez, A.M., Zerva, K... [et. al.].: "Direct and compound-nucleus reaction mechanisms in the 7Be + 58Ni system at near-barrier energies". Physical Review C. Vol. 92, n. 2, (2015). DOI: 10.1103/PhysRevC.92.024615 DS Repositorio Institucional de la Universidad de Huelva RD 1 jun 2026