학술논문
Systematic reduction of the proton-removal cross section in neutron-rich medium-mass nuclei
Document Type
Working Paper
Author
Díaz-Cortés, J.; Benlliure, J.; Rodríguez-Sánchez, J. L.; Álvarez-Pol, H.; Aumann, T.; Bertulani, C. A.; Blank, B.; Casarejos, E.; Cortina-Gil, D.; Dragosavac, D.; Föhr, V.; Gargano, A.; Gascón, M.; Gawlikowicz, W.; Heinz, A.; Helariutta, K.; Kelić-Heil, A.; Lukić, S.; Montes, F.; Pérez-Loureiro, D.; Pieńkowski, L.; Schmidt, K-H.; Staniou, M.; Subotić, K.; Sümmerer, K.; Taieb, J.; Trzcińska, A.
Source
Subject
Language
Abstract
Single neutron- and proton-removal cross sections have been systematically measured for 72 medium-mass neutron-rich nuclei around Z=50 and energies around 900A MeV using the FRagment Separator (FRS) at GSI. Neutron-removal cross sections are described by considering the knock-out process together with initial- and final-state interactions. Proton-removal cross sections are, however, significantly smaller than predicted by the same calculations. The observed difference can be explained as due to the knockout of short-correlated protons in neutron-proton dominating pairs.