RT Journal Article
T1 Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier
A1 Spartà, R.
A1 Martel Bravo, Ismael
A1 Acosta Sánchez, Luis Armando
A1 Viñals, S.
AB Proton halo effects in the 8B+64Zn reaction at an energy around 1.5 times the Coulomb barrier have been studied at HIE-ISOLDE CERN using, for the first time, the only existing postaccelerated 8B beam. This, together with the use of a high granularity and large solid angle detection system, allowed for a careful mapping of the elastic angular distribution, especially in the Coulomb-nuclear interference region. Contrary to what is observed for the one-neutron halo nucleus 11Be on the same target in a similar energy range, the analysis of the elastic scattering angular distribution shows only a modest suppression of the Coulomb-nuclear interference peak, with no remarkable enhancement of the total reaction cross-section. Inclusive angular and energy distributions of 7Be produced in direct reaction processes have also been measured. The comparison of these data with the results of theoretical calculations for the elastic and non-elastic breakup contributions indicate that both processes are important. Overall, the experimental data suggest a 8B collision dynamics at the barrier very different from the one of neutron halo nuclei, showing only modest effects of coupling to continuum. This behaviour can be interpreted as due to the presence of the additional Coulomb interactions halo-core and halo-target together with the presence of the centrifugal barrier felt by the valence proton of 8B.
PB Elsevier
SN 0370-2693
YR 2021
FD 2021
LK http://hdl.handle.net/10272/20223
UL http://hdl.handle.net/10272/20223
LA eng
NO Spartà, R., Di Pietro, A., Figuera, P., Tengblad, O., Moro, A. M., Martel, I., Fernández-García, J. P., Lei, J., Acosta, L., Borge, M. J. G., Bruni, G., Cederkäll, J., Davinson, T., Ovejas, J. D., Fraile, L. M., Galaviz, D., Halkjaer Jensen, J., Jonson, B., La Cognata, M., … Viñals, S. (2021). Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier. In Physics Letters B (Vol. 820, p. 136477). Elsevier BV. https://doi.org/10.1016/j.physletb.2021.136477
NO We wish to thank Dr. A. Bonaccorso for useful discussions andsuggestions. This work has been supported by the European Commission Horizon 2020 framework trans-national access program ofthe EU project ENSAR2 (Grant no. 654002). Some of us acknowledge the support of the Istituto Nazionale di Fisica Nucleare (INFN),the UKRI STFC and the Spanish Funding Agency under the projects:“ELEGANT” PGC2018-095640-B-100, FIS2017-88410-P, PDI2019-104390GB-100, FPA2016-77689-C2-1-R, PGC2018-096994-B-C21,PGC2018-096994-B-C22, RTI2018-098868-B-I00. L.A. is partiallysupported by DGAPA PAPIIT-IN107820 and CONACYT 314857. L.M.Fis partially supported by the CERN associates program. D.G. issupported by the Portuguese FCT under the project CERN/FISPAR/0005/2017
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026