Reaction mechanisms of the O-16 + Cu-65 system
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Physical Review C
Exportar
Resumo
We have measured a precise quasielastic excitation function for the 16O + 65Cu system, at θLAB = 161◦,
and at bombarding energies near the Coulomb barrier. A quasielastic barrier distribution for this system was
deduced from the experimental quasielastic excitation function. An α-stripping excitation function has also
been measured at the same experimental conditions. These new data have been used to investigate the relative
importance of several reaction channels in the reaction mechanism of the 16O + 65Cu system. Large-scale
coupled-channel calculations and coupled-reaction-channel calculations have been performed. No imaginary
potential was used at the barrier region because many channels have been explicitly included in the calculations.
Only an inner short-range potential was used to account for the fusion process. We did not fit data by varying
potential parameters, and our theoretical results were compared directly to data. Good agreement was found
between data and calculations. Owing to the high sensitivity of the barrier distribution, important results
have been obtained. The first excited state (1/2−) of 65Cu has less influence in the reaction mechanism than
the second (5/2−) and third (7/2−) states, which are the most relevant among all the investigated ones. We
have also observed a striking influence of the reorientation of the ground-state spin of the 65Cu nucleus on
the elastic scattering at backward angles. In addition, calculations have shown that the excitation of the states
3−
, 2+
, 1−, and 2− of the projectile 16O are also important for excellent agreement obtained with both the
excitation function and the distribution of barriers. The α-stripping data have been compared to the results of
coupled-reaction-channel calculations and good agreement was obtained with the inclusion of the first excited
state of 12C in the coupling scheme. However, the α-transfer process has a small influence on the reaction
dynamics of this system at the investigated energies.
Como referenciar
CREMA, E.; ZAGATTO, V.A.B.; SHORTO, J.M.B.; PAES, B.; LUBIAN, J.; SIMÕES, R.F.; MONTEIRO, D.S.; HUIZA, J.F.P.; ADDED, N.; MORAIS, M.C.; GOMES, P.R.S. Reaction mechanisms of the O-16 + Cu-65 system. Physical Review C, v. 99, n. 5, p. 054623-1 - 054623-10, 2019. DOI: 10.1103/PhysRevC.99.054623. Disponível em: http://repositorio.ipen.br/handle/123456789/30026. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.