RT Journal Article
T1 Quasi-free neutron and proton knockout reactions from light nuclei in a wide neutron-to-proton asymmetry range
A1 Holl, Matthias
A1 Fraile Prieto, Luis Mario
A1 Zuber, Kai
AB The quasi-free scattering reactions C-11(p, 2p) and C-10,C-11,C-12(p, pn) have been studied in inverse kinematics at beam energies of 300-400 MeV/u at the (RB)-B-3-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 C-12(p, 2p) and C-12(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. (C) 2019 The Authors. Published by Elsevier B.V.
PB Elsevier Science BV
SN 0370-2693
YR 2019
FD 2019
LK https://hdl.handle.net/20.500.14352/13788
UL https://hdl.handle.net/20.500.14352/13788
LA eng
NO © 2019 The Authors. Published by Elsevier B.V. Artículo firmado por 69 autores. 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. Supported by the Portuguese FCT under the project PTDC/FIS/103902/2008.
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO German Federal Ministry of Education and Research (BMBF), through the GSI-TU Darmstadt cooperationFederal Ministry of Education & Research (BMBF)
NO State of Hesse through the LOEWE center HIC for FAIR
NO Helmholtz-Gemeinschaft through the graduate school HGS-HIRe
NO Swedish Research Council
NO U.S. NSF grant National Science Foundation (NSF)
NO U.S. DOE grant United States Department of Energy (DOE)
NO Portuguese FCT
DS Docta Complutense
RD 8 jun 2026