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Volume 281 - The 26th International Nuclear Physics Conference (INPC2016) - Nuclear Reactions – Tuesday 13
Scattering Of The Halo Nucleus 11Be On A 197Au Target At Energies Around The Coulomb Barrier
M.J. G. Borge,* V. Pesudo, E. Nácher, O. Tengblad., M. Cubero., A. Perea, A.M. Moro, J.A. Lay, J. Gómez-Camacho., M.A.G. Alvarez, J.P. Fernandez-Garcia, A. Di Prieto, P. Figuera, M. Fisichella., M. Lattuada., V. Scuderi, G. Marquínez-Durán, I. Martel., A.M. Sánchez-Benítez, M. Alcorta., P.C. Bender, R. Braid., A.B. Garnsworthy, G. Hackman., D. Miller., M. Moukaddam., M.M. Rajabali., C. Unsworth., Z.M. Wang, B.R. Fulton, U. Hager, O. Kirsebom, K. Kuhn., P.D. O'Malley., F. Sarazin, C.E. Svensson
*corresponding author
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Pre-published on: 2017 May 04
Published on: 2017 May 09
The angular distributions of the elastic, inelastic scattering and break-up cross sections of the one neutron halo $^{11}$Be on a heavy-mass target ($^{197}$Au) have been measured
at laboratory energies below (31.9 MeV) and around (39.6 MeV) the Coulomb barrier ($V_b \sim$ 40 MeV).
The elastic, inelastic channel and break-up channels of the $^{11}$Be + $^{197}$Au reaction have been experimentally separated for the first time in this energy range.
The experiment was performed at TRIUMF, using
four Silicon detectors in telescope configuration to separate the $^{11}$Be from the $^{10}$Be fragments and the High-Purity
Germanium Detector Array TIGRESS for $\gamma$-ray detection.
The break-up and inelastic scattering contributions are observed to be relevant even at energies well below the Coulomb barrier.
Data are compared with different models of increasing degree of sophistication: semiclassical, inert-core continuum discretised coupled channel (CDCC) calculations and CDCC including core deformation and excitations (XCDCC).
XCDCC calculations are necessary to reproduce simultaneously elastic, inelastic and break-up scattering data.
The results show that the reaction mechanism is sensible to the entanglement of core and halo degrees of freedom in $^{197}$Au.
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