Properties of the 7 He ground state from 8 He neutron knockout ∗

Yu. Aksyutina1,2, H.T. Johansson 2, T. Aumann1, K. Boretzky1, M.J.G. Borge3, A. Chatillon1, L.V. Chulkov1,4, D. Cortina-Gil 5, U. Datta Pramanik 6, H. Emling1, C. Forsśen1, H.O.U. Fynbo7, H. Geissel 1, G. Ickert1, B. Jonson2, R. Kulessa8, C. Langer 1,9, M. Lantz2, T. Le Bleis1,9, K. Mahata1, G. Münzenberg 1, T. Nilsson2, G. Nyman2, S. Paschalis 10, W. Prokopowicz1, R. Reifarth1,9, A. Richter11, K. Riisager 7, G. Schrieder 11, H. Simon1, K. Sümmerer 1, O. Tengblad3, H. Weick1, and M. Zhukov2 1GSI, Germany;2Chalmers University of Technology, Sweden; 3CSIC Madrid, Spain;4RRC Kurchatov Institute Moscow, Russia;5University of Santiago de Compostela, Spain; 6SINP Kolkata, India;7Aarhus University, Denmark; 8Jagellonian University Krakow, Poland; 9University of Frankfurt, Germany; 10University of Liverpool, United Kingdom; 11Technische Universit ät, Darmstadt, Germany