Bibcode
Zhang, H. Q.; Zhang, C. L.; Lin, C. J.; Liu, Z. H.; Yang, F.; Nasirov, A. K.; Mandaglio, G.; Manganaro, M.; Giardina, G.
Referencia bibliográfica
Physical Review C, vol. 81, Issue 3, id. 034611
Fecha de publicación:
3
2010
Número de citas
59
Número de citas referidas
48
Descripción
The angular distributions of fission fragments for the S32+W184 reaction
at center-of-mass energies of 118.8, 123.1, 127.3, 131.5, 135.8, 141.1,
and 144.4 MeV are measured. The experimental fission excitation function
is obtained. The anisotropy (Aexp) is found by extrapolating
each fission fragment angular distribution. The measured fission cross
sections of the S32+W182,184 reaction are decomposed into
fusion-fission, quasifission, and fast-fission contributions by the
dinuclear system model (DNS). The angular momentum distributions of the
dinuclear system and compound nucleus calculated by the DNS model are
used to reproduce the experimental capture and fusion excitation
functions for both reactions and quantities K02,
<ℓ2>, and Aexp, which characterize
angular distributions of the fission products at the considered range of
beam energy. The total evaporation residue excitation function for the
S32+W184 reaction calculated in the framework of the advanced
statistical model is close to the available experimental data only up to
about Ec.m.≈160 MeV. The underestimation of the
experimental data at high excitation energies Ec.m.>160
MeV is explained by the fact that the statistical model cannot reproduce
the cross section of evaporation residues formed by the nonequilibrium
mechanism, that is, without formation of the compound nucleus in the
statistical equilibrium state.