Probing proton halo effects in the 8B+64Zn collision around the Coulomb barrier
Journal article, 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

Author

R. Spartà

National Institute for Nuclear Physics

University of Catania

A. Di Pietro

National Institute for Nuclear Physics

P. Figuera

National Institute for Nuclear Physics

O. Tengblad

CSIC - Instituto de Estructura de la Materia (IEM)

A. Moro

University of Seville

I. Martel

University of Huelva

J. P. Fernandez-Garcia

University of Seville

Jin Lei

National Institute for Nuclear Physics

L. Acosta

National Institute for Nuclear Physics

Universidad Nacional Autonoma de Mexico

M. Borge

CSIC - Instituto de Estructura de la Materia (IEM)

Giovanni Bruni

Chalmers, Physics, Subatomic and Plasma Physics

J. Cederkall

Lund University

T. Davinson

University of Edinburgh

J. D. Ovejas

CSIC - Instituto de Estructura de la Materia (IEM)

L. M. Fraile

Complutense University

CERN

D. Galaviz

LIP - Lisboa

J. Halkjaer Jensen

Aarhus University

Björn Jonson

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

M. La Cognata

National Institute for Nuclear Physics

A. Perea

CSIC - Instituto de Estructura de la Materia (IEM)

A. M. Sanchez-Benitez

University of 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 136477

Subject Categories

Accelerator Physics and Instrumentation

Subatomic Physics

Atom and Molecular Physics and Optics

DOI

10.1016/j.physletb.2021.136477

More information

Latest update

9/27/2021