Effect of breakup and resonance states of6Li on fusion

40th Symposium on Nuclear Physics 2017

Gómez Camacho, A.^1

Departamento de Aceleradores, Instituto Nacional de Investigaciones Nucleares, Apartado Postal 18-1027, México, D.F.

C.P. 11801, Mexico^1

关键词: Absorption potential;    Cluster structure;    Coulomb barrier;    Energy spaces;    Low-lying excited state;    Non-resonances;    Resonance state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/876/1/012011/pdf
DOI  :  10.1088/1742-6596/876/1/012011

来源: IOP

【 摘 要 】

CDCC calculations of total fusion cross sections are presented for reactions of the weakly bound6Li with targets144Sm and154Sm at energies around the Coulomb barrier. Couplings to the low-lying excited states 2+, 3-of144Sm and 2+, 4+of154Sm are included in the calculations. In the cluster structure frame of6Li → α + d, short range absorption potentials are considered for the interactions between α- and d- with the target to account for fusion. The effect of the excited states of the target on total fusion is investigated, as well as, that from couplings of resonance states of6Li, namely, l = 2, Jπ= 3+, 2+, 1+. The latter effect is calculated by two different approaches, (a) by considering only resonance states couplings and (b) by omitting these states from the full discretized energy space. Among other things, it is found that resonance and non-resonance continuum couplings give rise to small and similar fusion suppression at the higher energies.