Systematic study of Δ (1232) resonance excitations using single isobaric charge-exchange reactions induced by medium-mass projectiles of Sn
Journal article, 2022
The fragment separator FRS has been used for the first time to measure the (n,p)- and (p,n)-type isobaric charge-exchange cross sections of stable Sn112,124 isotopes accelerated at 1A GeV with an uncertainty of 3% and to separate quasielastic and inelastic components in the missing-energy spectra of the ejectiles. The inelastic contribution can be associated to the excitation of isobar Δ(1232) resonances and to the pion emission in s wave, in both the target and projectile nuclei, while the quasielastic contribution is associated with the nuclear spin-isospin response of nucleon-hole excitations. The data lead to interesting results, where we observe a clear quenching of the quasielastic component, and their comparisons to theoretical calculations demonstrate that the baryonic resonances can be excited in the target and projectile nuclei. To go further in this investigation, we propose to study the excitation of baryonic resonances, taking advantage of the combination of high-resolving power magnetic spectrometers with the Wide Angle Shower Apparatus (WASA) calorimeter. These new measurements will allow us to determine the momenta of the ejectiles and pions emitted in coincidence after the single isobaric charge-exchange collisions, providing us unique opportunities to study the evolution of the baryonic resonance dynamics with the neutron-proton asymmetry through the use of exotic radioactive ion beams.
Author
J. L. Rodriguez-Sanchez
Helmholtz
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
I. Vidaña
University of Catania
H. Lenske
Justus Liebig University Giessen
J. Vargas
Universidade de Santiagode Compostela
Universidad Santo Tomás
C. Scheidenberger
Helmholtz
H. Alvarez-Pol
Universidade de Santiagode Compostela
J. Atkinson
Helmholtz
T. Aumann
Technische Universität Darmstadt
Helmholtz
Y. Ayyad
Universidade de Santiagode Compostela
S. Beceiro-Novo
Universidade de Santiagode Compostela
Michigan State University
K. Boretzky
Helmholtz
M. Caamano
Universidade de Santiagode Compostela
E. Casarejos
University of Vigo
D. Cortina-Gil
Universidade de Santiagode Compostela
Paloma Diaz Fernandez
Universidade de Santiagode Compostela
Chalmers, Physics, Subatomic and Plasma Physics
A. Estradé
Helmholtz
Central Michigan University
Saint Mary's University
H. Geissel
Helmholtz
E. Haettner
Helmholtz
A. Kelić-Heil
Helmholtz
Y. Litvinov
Helmholtz
C. Paradela
European Commission (EC)
Universidade de Santiagode Compostela
D. Perez-Loureiro
Michigan State University
Universidade de Santiagode Compostela
S. Pietri
Helmholtz
Niigata University
A. Prochazka
Helmholtz
M. Takechi
Helmholtz
Y. K. Tanaka
RIKEN
Helmholtz
H. Weick
Helmholtz
J. S. Winfield
Helmholtz
Physical Review C
24699985 (ISSN) 24699993 (eISSN)
Vol. 106 1 014618Subject Categories (SSIF 2011)
Accelerator Physics and Instrumentation
Subatomic Physics
Atom and Molecular Physics and Optics
DOI
10.1103/PhysRevC.106.014618