Systematic reduction of the proton-removal cross section in neutron-rich medium-mass nuclei
Journal article, 2020
Single-neutron and single-proton removal cross sections have been measured for medium-mass neutron-rich nuclei around Z=50 and energies around 1000A MeV using the FRagment Separator (FRS) at GSI. The measured cross sections confirm the relative low values of the proton-removal cross sections, observed since a long time ago and not yet understood. Model calculations considering the knock-out process together with initial- and final-state interactions describe the measured neutron-removal cross sections. Proton-removal cross sections are, however, significantly over-predicted by the same calculations. The observed difference can be explained to a large extent by the knock-out of short-range correlated nucleons from dominant neutron-proton pairs in neutron-rich nuclei.
Nucleon removal
Short-range correlations
Medium-mass neutron-rich nuclei
Author
J. Díaz-Cortes
Universidade de Santiagode Compostela
J. Benlliure
Universidade de Santiagode Compostela
J. L. Rodriguez-Sanchez
Universidade de Santiagode Compostela
H. Alvarez-Pol
Universidade de Santiagode Compostela
T. Aumann
Technische Universität Darmstadt
C.A. Bertulani
Texas A&M University
B. Blank
Centre d'Etudes Nucleaires de Bordeaux Gradignan
E. Casarejos
University of Vigo
D. Cortina-Gil
Universidade de Santiagode Compostela
D. Dragosavac
Universidade de Santiagode Compostela
V. Föhr
Helmholtz
A. Gargano
National Institute for Nuclear Physics
M. Gascon
Universidade de Santiagode Compostela
W. Gawlikowicz
Cardinal Stefan Wyszyński University in Warsaw
Andreas Martin Heinz
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
K. Helariutta
University of Helsinki
A. Kelic-Heil
Helmholtz
S. Lukić
Helmholtz
F. Montes
Helmholtz
D. Perez-Loureiro
Universidade de Santiagode Compostela
L. Pieńkowski
University of Warsaw
K. H. Schmidt
Helmholtz
M. Staniou
Helmholtz
K. Subotić
Institut za nuklearne nauke Vinca
K. Summerer
Helmholtz
J. Taieb
The French Alternative Energies and Atomic Energy Commission (CEA)
A. Trzcińska
University of Warsaw
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
0370-2693 (ISSN)
Vol. 811 135962Subject Categories
Accelerator Physics and Instrumentation
Subatomic Physics
Theoretical Chemistry
DOI
10.1016/j.physletb.2020.135962