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 136477

Ämneskategorier

Acceleratorfysik och instrumentering

Subatomär fysik

Atom- och molekylfysik och optik

DOI

10.1016/j.physletb.2021.136477

Mer information

Senast uppdaterat

2021-09-27