학술논문
Systematic reduction of the proton-removal cross section in neutron-rich medium-mass nuclei
Document Type
article
Author
J. Díaz-Cortés; J. Benlliure; J.L. Rodríguez-Sánchez; H. Álvarez-Pol; T. Aumann; C.A. Bertulani; B. Blank; E. Casarejos; D. Cortina-Gil; D. Dragosavac; V. Föhr; A. Gargano; M. Gascón; W. Gawlikowicz; A. Heinz; K. Helariutta; A. Kelić-Heil; S. Lukić; F. Montes; D. Pérez-Loureiro; L. Pieńkowski; K.-H. Schmidt; M. Staniou; K. Subotić; K. Sümmerer; J. Taieb; A. Trzcińska
Source
Physics Letters B, Vol 811, Iss , Pp 135962- (2020)
Subject
Language
English
ISSN
0370-2693
Abstract
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.