@article{fab95cf3c5354a139eb7a4567c2657ab,
title = "Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range",
abstract = "The quasi-free scattering reactions 11C(p,2p) and 10,11,12C(p,pn) have been studied in inverse kinematics at beam energies of 300–400 MeV/u at the R3B-LAND setup. The outgoing proton-proton and proton-neutron pairs were detected in coincidence with the reaction fragments in kinematically complete measurements. The efficiency to detect these pairs has been obtained from GEANT4 simulations which were tested using the 12C(p,2p) and 12C(p,pn) reactions. Experimental cross sections and momentum distributions have been obtained and compared to DWIA calculations based on eikonal theory. The new results reported here are combined with previously published cross sections for quasi-free scattering from oxygen and nitrogen isotopes and together they enable a systematic study of the reduction of single-particle strength compared to predictions of the shell model over a wide neutron-to-proton asymmetry range. The combined reduction factors show a weak or no dependence on isospin asymmetry, in contrast to the strong dependency reported in nucleon-removal reactions induced by nuclear targets at lower energies. However, the reduction factors for (p,2p) are found to be 'significantly smaller than for (p,pn) reactions for all investigated nuclei.",
keywords = "Inverse kinematics, Quasi-free scattering, Shell model, Spectroscopic factors",
author = "{RB Collaboration} and M. Holl and V. Panin and H. Alvarez-Pol and L. Atar and T. Aumann and S. Beceiro-Novo and J. Benlliure and Bertulani, {C. A.} and Boillos, {J. M.} and K. Boretzky and M. Caama{\~n}o and C. Caesar and E. Casarejos and W. Catford and J. Cederkall and L. Chulkov and D. Cortina-Gil and E. Cravo and I. Dillmann and {D{\'i}az Fern{\'a}ndez}, P. and Z. Elekes and J. Enders and Fraile, {L. M.} and {Galaviz Redondo}, D. and R. Gernh{\"a}user and P. Golubev and T. Heftrich and M. Heil and M. Heine and A. Heinz and A. Henriques and Johansson, {H. T.} and B. Jonson and N. Kalantar-Nayestanaki and R. Kanungo and A. Kelic-Heil and T. Kr{\"o}ll and N. Kurz and C. Langer and {Le Bleis}, T. and S. Lindberg and J. Machado and E. Nacher and Najafi, {M. A.} and T. Nilsson and C. Nociforo and S. Paschalis and M. Petri and R. Reifarth and G. Ribeiro",
note = "info:eu-repo/grantAgreement/FCT/3599-PPCDT/103902/PT# This work was supported by the German Federal Ministry of Education and Research (BMBF projects 05P2015RDFN1 and 05P15WOFNA), through the GSI-TU Darmstadt cooperation agreement, by the State of Hesse through the LOEWE center HIC for FAIR, and the Helmholtz-Gemeinschaft through the graduate school HGS-HIRe. This work was supported by the European Union by means of the European Commission within its Seventh Framework Program (FP7) via ENSAR (Contract No. 262010), and the Spanish CICYT research grants FPA2012-32443, FPA2015-64969-07387, and FPA2015-69640-C2-1-P. This work has supported by the Swedish Research Council under contract number 621-2011-5324. C.A.B. acknowledges support from the U.S. NSF grant No. 1415656 and the U.S. DOE grant No. DE-FG02-08ER41533. ",
year = "2019",
month = aug,
day = "10",
doi = "10.1016/j.physletb.2019.06.069",
language = "English",
volume = "795",
pages = "682--688",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier",
}