Bibcode
Mandaglio, G.; Fazio, G.; Giardina, G.; Hanappe, F.; Manganaro, M.; Muminov, A. I.; Nasirov, A. K.; Saccá, C.
Referencia bibliográfica
Physics of Atomic Nuclei, Volume 72, Issue 10, pp.1639-1650
Fecha de publicación:
10
2009
Número de citas
10
Número de citas referidas
8
Descripción
The measured yield of evaporation residues in reactions with massive
nuclei have been well reproduced by using the partial fusion and
quasifission cross sections obtained in the dinuclear-system model. The
influence of the orientation angles of the projectile- and
target-nucleus symmetry axes relative to the beam direction on the
production of the evaporation residues is investigated for the
48Ca + 154Sm reaction as a function of the beam
energy. At the low beam energies only the orientation angles close to
αP = 30° (projectile) and αP = 0°-15° (target)
can contribute to the formation of evaporation residues. At large beam
energies (about E c.m. = 140-180 MeV) the collisions at all
values of orientation angles αP and α T of
reactants can contribute to the evaporation residue cross section which
ranges between 10-100 mb, while at E c.m. > 185 MeV the
evaporation residue cross section ranges between 0.1-1 mb because the
fission barrier for the compound nucleus decreases by increasing its
excitation energy and angular momentum.