Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier
Artikel i vetenskaplig tidskrift, 2021
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.
Elastic scattering
Halo nuclei
Breakup
Författare
R. Spartà
Istituto Nazionale di Fisica Nucleare
Universita degli Studi di Catania
A. Di Pietro
Istituto Nazionale di Fisica Nucleare
P. Figuera
Istituto Nazionale di Fisica Nucleare
O. Tengblad
CSIC - Instituto de Estructura de la Materia (IEM)
A. Moro
Universidad de Sevilla
I. Martel
Universidad de Huelva
J. P. Fernandez-Garcia
Universidad de Sevilla
Jin Lei
Istituto Nazionale di Fisica Nucleare
L. Acosta
Istituto Nazionale di Fisica Nucleare
Universidad Nacional Autónoma de México
M. Borge
CSIC - Instituto de Estructura de la Materia (IEM)
Giovanni Bruni
Chalmers, Fysik, Subatomär fysik och plasmafysik
J. Cederkall
Lunds universitet
T. Davinson
University of Edinburgh
J. D. Ovejas
CSIC - Instituto de Estructura de la Materia (IEM)
L. M. Fraile
Universidad Complutense de Madrid
CERN
D. Galaviz
LIP - Lisboa
J. Halkjaer Jensen
Aarhus Universitet
Björn Jonson
Chalmers, Fysik, Subatomär, högenergi- och plasmafysik
M. La Cognata
Istituto Nazionale di Fisica Nucleare
A. Perea
CSIC - Instituto de Estructura de la Materia (IEM)
A. M. Sanchez-Benitez
Universidad de Huelva
N. Soić
Ruder Boskovic Institute
S. Viñals
CSIC - Instituto de Estructura de la Materia (IEM)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 820 136477Ämneskategorier
Acceleratorfysik och instrumentering
Subatomär fysik
Atom- och molekylfysik och optik
DOI
10.1016/j.physletb.2021.136477