TY - JOUR A1 - Atar, Leyla A1 - Paschalis, Stefanos A1 - Barbieri, Carlo A1 - Bertulani, Carlos A. A1 - Díaz Fernández, Paloma A1 - Holl, Matthias A1 - Najafi, Mohammad Ali A1 - Panin, Valerii A1 - Alvarez-Pol, Héctor A1 - Aumann, Thomas A1 - Avdeichikov, Vladimir A1 - Beceiro-Novo, Saul A1 - Bemmerer, Daniel A1 - Benlliure Anaya, Jose Fernando A1 - Boillos Betete, Juan Manuel A1 - Boretzky, Konstanze A1 - Garcia Borge, Maria José A1 - Caamaño, Manuel A1 - Caesar, Christoph A1 - Casarejos Ruiz, Enrique A1 - Catford, Wilton N. A1 - Cederkäll, Joakim A1 - Chartier, Marielle A1 - Chulkov, Leonid V. A1 - Cortina Gil, Dolores A1 - Cravo, Edgar A1 - Crespo, Raquel A1 - Dillmann, Iris A1 - Elekes, Zoltán A1 - Enders, Joachim A1 - Ershova, Olga A1 - Estradé Vaz, Alfredo A1 - Farinon, Fabio A1 - Fraile Prieto, Luis Mario A1 - Freer, Martin A1 - Galaviz Redondo, Daniel A1 - Geissel, Hans A1 - Gernhäuser, Roman A1 - Golubev, Pavel A1 - Göbel, Kathrin A1 - Hagdahl, Julius A1 - Heftrich, Tanja A1 - Heil, Michael A1 - Heine, Marcel A1 - Heinz, Andreas A1 - Henriques, Ana A1 - Hufnagel, Alexander A1 - Ignatov, Alexander A1 - Johansson, Håkan T. A1 - Jonson, Björn A1 - Kahlbow, Julian A1 - Kalantar-Nayestanaki, Nasser A1 - Kanungo, Rituparna A1 - Kelic-Heil, Aleksandra A1 - Knyazev, Alexander A1 - Kröll, Thorsten A1 - Kurz, Nikolaus A1 - Labiche, Marc A1 - Langer, Christoph A1 - Le Bleis, Tudi A1 - Lemmon, Roy Crawford A1 - Lindberg, Simon A1 - Machado, Jorge A1 - Marganiec-Gałązka, J. A1 - Movsesyan, Alina A1 - Nácher González, Enrique A1 - Nikolskii, Evgenii Y. A1 - Nilsson, Thomas A1 - Nociforo, Chiara A1 - Perea Martinez, Angel A1 - Petri, Marina A1 - Pietri, Stephane A1 - Plag, Ralf A1 - Reifarth, René A1 - Ribeiro Jimenez, Guillermo A1 - Rigollet, Catherine A1 - Rossi, Dominic M. A1 - Röder, Marko A1 - Savran, Deniz A1 - Scheit, Heiko A1 - Simon, Haik A1 - Sorlin, Olivier A1 - Syndikus, Ina A1 - Taylor, Jonathan Thomas A1 - Tengblad, Olof A1 - Thies, Ronja A1 - Togano, Yasuhiro A1 - Vandebrouck, Marine A1 - Velho, Paulo A1 - Volkov, Vasily A1 - Wagner, Andreas A1 - Wamers, Felix A1 - Weick, Helmut A1 - Wheldon, Carl A1 - Wilson, Gemma Louise A1 - Winfield, John S. A1 - Woods, Philip John A1 - Yakorev, Dmitry A1 - Zhukov, Mikhail V. A1 - Zilges, Andreas A1 - Zuber, Kai T1 - Quasifree (p, 2p) reactions on oxygen isotopes: observation of isospin independence of the reduced single-particle strength T2 - Physical review letters N2 - Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300–450  MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type AO(p,2p)A−1N have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry. KW - Direct reactions KW - Nuclear reactions KW - Nuclear structure & decays KW - Nucleon induced nuclear reactions KW - Shell model KW - Spectroscopic factors & electromagnetic moments Y1 - 2018 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62876 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-628768 SN - 1079-7114 N1 - This work was supported by the German Federal Ministry for Education and Research (BMBF project 05P15RDFN1), and through the GSI-TU Darmstadt co- operation agreement. The work of C. B., W. C., and G. W. was supported by the United Kingdom Science and Technology Facilities Council (STFC) under Grants No. ST/L005743/1 and No. ST/P005314/1. SCGF calcu- lations were performed at the DiRAC Complexity system of the University of Leicester (BIS National E-1023 infrastructure capital Grant No. ST/K000373/1 and STFC 1024 Grant No. ST/K0003259/1). C. A. B. acknowl- edges support by the U.S. DOE Grant No. DE-FG02- 08ER41533 and the U.S. NSF Grant No. 1415656. L. M. F. acknowledges funding from MINECO FPA2015-65035-P project. N1 - Correspondance: R3B Collaboration, L.Atar@gsi.de, t.aumann@gsi.de. VL - 120 IS - 5, art. 052501 SP - 1 EP - 7 PB - APS CY - College Park, Md. ER -