PHYSICAL REVIEW C 96, 034615 (2017)
Global description of the
7
Li + p reaction at 5.44 MeV/u in a continuum-discretized
coupled-channels approach
A. Pakou,
1 , *
F. Cappuzzello,
2, 3
N. Keeley,
4
L. Acosta,
5, 6
C. Agodi,
2
X. Aslanoglou,
1
S. Calabrese,
2, 3
D. Carbone,
2
M. Cavallaro,
2
A. Foti,
3, 6
G. Marquínez-Durán,
7
I. Martel,
7
M. Mazzocco,
8, 9
C. Parascandolo,
10
D. Pierroutsakou,
10
K. Rusek,
11
O. Sgouros,
1
V. Soukeras,
1
E. Strano,
8, 9
V. A. B. Zagatto,
12
and K. Zerva
1
1
Department of Physics and HINP, The University of Ioannina, 45110 Ioannina, Greece
2
INFN-Laboratori Nazionali del Sud, via Santa Sofia 62, 95125 Catania, Italy
3
Dipartimento di Fisica e Astronomia, Universita di Catania, via Santa Sofia 64, 95125 Catania, Italy
4
National Centre for Nuclear Research, ulica Andrzeja Soltana 7, 05-400 Otwock, Poland
5
Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Mexico Distrito Federal 01000, Mexico
6
INFN-Sezione di Catania, via Santa Sofia 64, 95125 Catania, Italy
7
Departamento de Ciencias Integradas, Facultad de Ciencias Experimentales, Campus de El Carmen,
Universidad de Huelva, 21071 Huelva, Spain
8
Departimento di Fisica e Astronomia, Universita di Padova, via Marzolo 8, I-35131 Padova, Italy
9
INFN-Sezione di Padova, via Marzolo 8, I-35131 Padova, Italy
10
INFN-Sezione di Napoli, via Cinthia, I-80126 Napoli, Italy
11
Heavy Ion Laboratory, University of Warsaw, ulica Pasteura 5a, 02-093 Warsaw, Poland
12
Instituto de Física da Universidade Federal Fluminense, Avenida General Milton Tavares de Souza, Niterói, Brazil
(Received 11 June 2017; revised manuscript received 22 August 2017; published 21 September 2017)
The complete set of open channels for the
7
Li + p system, namely elastic scattering, inelastic scattering,
breakup, the
7
Li + p →
7
Be + n charge exchange reaction, and the
7
Li + p →
4
He +
4
He reaction, was
measured in the same experiment in inverse kinematics at an energy of 5.44 MeV/u. Data were also obtained for
the charge exchange reaction at energies of 5.0 and 3.57 MeV/u. The elastic and inelastic scattering and breakup
data were reported previously and are reviewed here and, together with the new data for the other two reactions,
are discussed coherently within the same continuum-discretized coupled-channels model framework.
DOI: 10.1103/PhysRevC.96.034615
I. INTRODUCTION
As part of an extensive program investigating proton
scattering from weakly bound nuclei in inverse kinematics we
recently considered the
7
Li + p elastic scattering at several
near-barrier energies (2.29, 3.57, 5.0, and 5.44 MeV/u[1]).
The measurements were performed using the MAGNEX
spectrometer [2] of the Instituto Nazionale di Fisica Nucleare
Laboratori Nazionali del Sud (INFN LNS) and the data
were analyzed within the continuum-discretized coupled-
channels (CDCC) approach. However, for a more effective
interpretation of the experimental data in a channel coupling
scheme a global investigation of all the reaction channels
involved is necessary. In this spirit, we consider in this article
simultaneous measurements of all open channels involved
in the
7
Li + p reaction at 5.44 MeV/u(E/V
C
∼ 7), that
is, elastic scattering, inelastic scattering, breakup, the charge
exchange reaction
7
Li + p →
7
Be + n to the ground and
first excited states of
7
Be, and the transfer/compound nucleus
reaction
7
Li + p →
4
He +
4
He, all on the same footing. Data
for the charge exchange reactions at 5.0 and 3.57 MeV/u are
also presented. The elastic and inelastic scattering and breakup
reaction channels were reported previously [1,3].
The effect of the breakup coupling on the elastic scattering
is investigated in more detail and the new data for the
*
apakou@cc.uoi.gr
charge exchange and the (p,α) reactions are compared with
previous measurements [4–6]. As the output of our CDCC
calculations includes not only elastic, inelastic, and breakup
angular distributions but also a total absorption cross section,
these two reactions enable us further to test our CDCC
calculations since the absorption cross section of the CDCC
calculations should be equal to the sum of the measured
charge exchange and (p,α) reactions, these being the only two
open channels in this energy regime not explicitly included
in the coupling scheme. Since the new complete data set at
5.44 MeV/u reported here was taken simultaneously in the
same experiment, the absolute normalization of the individual
channels is well established. The good agreement with the
existing data for the charge exchange and (p,α) reactions
where the two sets of measurement overlap therefore enables
us to compare these data with our CDCC calculations at 5.0,
3.57, and 2.29 MeV/u where complete data sets were not
obtained in a single experiment.
II. EXPERIMENTAL DETAILS
The experiment was performed at the INFN LNS in Catania,
Italy, with data taken at incident
7
Li beam energies of 16, 25,
35, and 38.1 MeV. A description of the experimental setup
may be found in Refs. [1,3] and only details pertinent to
this work are given here. Simultaneously with the elastic and
inelastic scattering reported in Ref. [1] data were collected
for
7
Be (ground and first excited states) originating from the
2469-9985/2017/96(3)/034615(6) 034615-1 ©2017 American Physical Society