TY  - JOUR
A1  - Lehr, Christopher
A1  - Wamers, Felix
A1  - Aksouh, Farouk
A1  - Aksyutina, Yuliya
A1  - Álvarez-Pol, Héctor
A1  - Atar, Leyla
A1  - Aumann, Thomas
A1  - Beceiro-Novo, Saul
A1  - Bertulani, Carlos A.
A1  - Boretzky, Konstanze
A1  - Garcia Borge, Maria José
A1  - Caesar, Christoph
A1  - Chartier, Marielle
A1  - Chatillon, Audrey
A1  - Chulkov, Leonid V.
A1  - Cortina Gil, Dolores
A1  - Díaz Fernández, Paloma
A1  - Emling, Hans
A1  - Ershova, Olga
A1  - Fraile Prieto, Luis M.
A1  - Fynbo, Hans Otto Uldall
A1  - Galaviz Redondo, Daniel
A1  - Geissel, Hans
A1  - Heil, Michael
A1  - Heine, Marcel
A1  - Hoffmann, Dieter H. H.
A1  - Holl, Matthias
A1  - Johansson, Håkan T.
A1  - Jonson, Björn
A1  - Karagiannis, Christos
A1  - Kiselev, Oleg A.
A1  - Kratz, Jens-Volker
A1  - Kulessa, Reinhard
A1  - Kurz, Nikolaus
A1  - Langer, Christoph
A1  - Lantz, Mattias
A1  - Le Bleis, Tudi
A1  - Lemmon, Roy Crawford
A1  - Litvinov, Yuri A.
A1  - Löher, Bastian
A1  - Mahata, Kripamay
A1  - Marganiec-Galązka, Justyna
A1  - Müntz, Christian
A1  - Nilsson, Thomas
A1  - Nociforo, Chiara
A1  - Ott, Wolfgang
A1  - Panin, Valerii
A1  - Paschalis, Stefanos
A1  - Perea Martinez, Angel
A1  - Plag, Ralf
A1  - Reifarth, René
A1  - Richter, Achim
A1  - Riisager, Karsten
A1  - Rodriguez-Tajes, Carme
A1  - Rossi, Dominic M.
A1  - Savran, Deniz
A1  - Scheit, Heiko
A1  - Schrieder, Gerhard
A1  - Schrock, Philipp
A1  - Simon, Haik
A1  - Stroth, Joachim
A1  - Sümmerer, Klaus
A1  - Tengblad, Olof
A1  - Weick, Helmut
A1  - Wimmer, Christine
T1  - Unveiling the two-proton halo character of 17Ne: Exclusive measurement of quasi-free proton-knockout reactions
T2  - Physics Letters B
N2  - The proton drip-line nucleus 17Ne is investigated experimentally in order to determine its two-proton halo character. A fully exclusive measurement of the 17Ne(p, 2p)16F∗ →15O+p quasi-free one-proton knockout reaction has been performed at GSI at around 500 MeV/nucleon beam energy. All particles resulting from the scattering process have been detected. The relevant reconstructed quantities are the angles of the two protons scattered in quasi-elastic kinematics, the decay of 16F into 15O (including γ decays from excited states) and a proton, as well as the 15O+p relative-energy spectrum and the 16F momentum distributions. The latter two quantities allow an independent and consistent determination of the fractions of l = 0 and l = 2 motion of the valence protons in 17Ne. With a resulting relatively small l = 0 component of only around 35(3)%, it is concluded that 17Ne exhibits a rather modest halo character only. The quantitative agreement of the two values deduced from the energy spectrum and the momentum distributions supports the theoretical treatment of the calculation of momentum distributions after quasi-free knockout reactions at high energies by taking into account distortions based on the Glauber theory. Moreover, the experimental data allow the separation of valence-proton knockout and knockout from the 15O core. The latter process contributes with 11.8(3.1) mb around 40% to the total proton-knockout cross section of 30.3(2.3) mb, which explains previously reported contradicting conclusions derived from inclusive cross sections.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/70221
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-702213
SN  - 1873-2445
SN  - 0370-2693
VL  - 827
IS  - 136957
PB  - Elsevier
CY  - Amsterdam
ER  -