Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Struktur und Dynamik von Kernen
HK 13.2: Vortrag
Montag, 19. März 2012, 17:00–17:15, P 4
Nuclear Breakup of 17Ne and its Two-Proton Halo Structure — •Felix Wamers1, Thomas Aumann1, Carlos Bertulani2, Leonid Chulkov3, Michael Heil3, Justyna Marganiec4,5, Ralf Plag3,6, and Haik Simon3 — 1Institut für Kernphysik, TU Darmstadt, Darmstadt, Germany — 2Texas A&M University-Commerce, Commerce, USA — 3Kernreaktionen und Nukleare Astrophysik, GSI, Darmstadt, Germany — 4ExtreMe Matter Institute, GSI, Darmstadt, Germany — 5JINA, Notre Dame, USA — 6Goethe Universität, Frankfurt, Germany
17Ne is a proton-dripline nucleus that has raised interest in nuclear-structure physics in recent years. As a (15O+2p) Borromean 3-body system, it is often considered to be a 2-proton-halo nucleus, yet lacking concluding experimental quantification of its structure. We have studied breakup reactions of 500 AMeV 17Ne secondary beams in inverse kinematics using the R3B-LAND setup at GSI. The foci were on (p,2p) quasi-free scattering on a CH2 target, and on one-proton-knockout reactions on a carbon target. Recoil protons have been detected with Si-Strip detectors and a surrounding 4pi NaI spectrometer. Furthermore, projectile-like forward protons after one-proton knockout from 17Ne have been measured in coincidence with the 15O residual core. The resulting relative-energy spectrum of the unbound 16F, as well as proton-removal cross sections with CH2 and C targets, and the transverse-momentum distributions of the residual fragments will be presented. Conclusions on the ground-state structure of 17Ne will be discussed. This work was supported by HIC for FAIR.